Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 28, 2020 Czech Republic's Petra Kvitova poses with Czech Republic's Karolina Muchova after winning their final match, as play resumes, following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 28, 2020 Czech Republic's Petra Kvitova poses with Czech Republic's Karolina Muchova after winning their final match, as play resumes, following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 28, 2020 Czech Republic's Petra Kvitova celebrates winning her final match with the trophy against Czech Republic's Karolina Muchova, as play resumes, following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 28, 2020 Czech Republic's Petra Kvitova with Czech Republic's Karolina Muchova after winning their final match, as play resumes, following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 28, 2020 Czech Republic's Petra Kvitova celebrates winning her final match with the trophy against Czech Republic's Karolina Muchova, as play resumes, following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 28, 2020 Czech Republic's Petra Kvitova celebrates winning her final match against Czech Republic's Karolina Muchova, as play resumes, following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 28, 2020 A spectator watches during the final match between Czech Republic's Petra Kvitova and Czech Republic's Karolina Muchova, as play resumes, following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 28, 2020 A spectator and photographers during the final match between Czech Republic's Petra Kvitova and Czech Republic's Karolina Muchova, as play resumes, following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 28, 2020 Czech Republic's Petra Kvitova in action during her final match against Czech Republic's Karolina Muchova, as play resumes, following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 28, 2020 Czech Republic's Petra Kvitova in action during her final match against Czech Republic's Karolina Muchova, as play resumes, following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 28, 2020 Czech Republic's Petra Kvitova celebrates during her final match against Czech Republic's Karolina Muchova, as play resumes, following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 28, 2020 Czech Republic's Petra Kvitova is seen wearing a mask after her final match against Czech Republic's Karolina Muchova, as play resumes, following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 28, 2020 Czech Republic's Karolina Muchova is seen wearing a mask after her final match against Czech Republic's Petra Kvitova, as play resumes, following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 28, 2020 Czech Republic's Petra Kvitova and Karolina Muchova are seen wearing masks after their final match, as play resumes, following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny TPX IMAGES OF THE DAY

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 28, 2020 A ball girl hold balls while wearing a mask and gloves during the final match between Czech Republic's Petra Kvitova and Czech Republic's Karolina Muchova, as play resumes, following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 28, 2020 Czech Republic's Petra Kvitova in action during her final match against Czech Republic's Karolina Muchova, as play resumes, following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 28, 2020 A ball girl watches on wearing a mask during the finakl match between Czech Republic's Petra Kvitova and Czech Republic's Karolina Muchova, as play resumes, following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 28, 2020 Czech Republic's Karolina Muchova in action during her final match against Czech Republic's Petra Kvitova, as play resumes, following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 28, 2020 Czech Republic's Karolina Muchova in action during her final match against Czech Republic's Petra Kvitova, as play resumes, following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny TPX IMAGES OF THE DAY

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 28, 2020 Czech Republic's Petra Kvitova in action during her final match against Czech Republic's Karolina Muchova, as play resumes, following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 28, 2020 Czech Republic's Petra Kvitova in action during her final match against Czech Republic's Karolina Muchova, as play resumes, following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 28, 2020 Czech Republic's Petra Kvitova comes out wearing a mask before her final match against Czech Republic's Karolina Muchova, as play resumes, following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 28, 2020 Czech Republic's Petra Kvitova in action during her final match against Czech Republic's Karolina Muchova, as play resumes, following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Soccer Football - Fortuna League - Sparta Prague v Viktoria Plzen - Generali Arena, Prague, Czech Republic - May 27, 2020. Sparta Prague's fan watches the match as play resumes following the outbreak of the coronavirus disease (COVID-19). Katerina Sulova/Pool via REUTERS

Soccer Football - Fortuna League - Sparta Prague v Viktoria Plzen - Generali Arena, Prague, Czech Republic - May 27, 2020. General view of the stadium during a match as play resumes following the outbreak of the coronavirus disease (COVID-19). Katerina Sulova/Pool via REUTERS

Soccer Football - Fortuna League - Sparta Prague v Viktoria Plzen - Generali Arena, Prague, Czech Republic - May 27, 2020. Sparta Prague's Benjamin Tetteh in action with Viktoria Plzen's Jakub Brabec, as play resumes following the outbreak of the coronavirus disease (COVID-19). Katerina Sulova/Pool via REUTERS

Fans watch a soccer match between Sparta Prague and Viktoria Plzen at a drive-in cinema, as the Czech top-tier soccer competition resumes after two-month shutdown caused by the measures taken to curb the coronavirus disease (COVID-19) outbreak in Prague, Czech Republic, May 27, 2020. REUTERS/David W Cerny

Fans watch a soccer match between Sparta Prague and Viktoria Plzen at a drive-in cinema, as the Czech top-tier soccer competition resumes after two-month shutdown caused by the measures taken to curb the coronavirus disease (COVID-19) outbreak in Prague, Czech Republic, May 27, 2020. REUTERS/David W Cerny

Fans watch a soccer match between Sparta Prague and Viktoria Plzen at a drive-in cinema, as the Czech top-tier soccer competition resumes after a two-month shutdown caused by the measures taken to curb the coronavirus disease (COVID-19) outbreak in Prague, Czech Republic, May 27, 2020. REUTERS/David W Cerny TPX IMAGES OF THE DAY

Fans watch a soccer match between Sparta Prague and Viktoria Plzen at a drive-in cinema, as the Czech top-tier soccer competition resumes after two-month shutdown caused by the measures taken to curb the coronavirus disease (COVID-19) outbreak in Prague, Czech Republic, May 27, 2020. REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 26, 2020 Czech Republic's Petra Kvitova in action during her match against Czech Republic's Barbora Krejcikova, as play resumes, following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 26, 2020 Czech Republic's Petra Kvitova wearing a face mask arrives for her match against Czech Republic's Barbora Krejcikova, as play resumes, following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 26, 2020 Czech Republic's Petra Kvitova wearing a face mask arrives for her match against Czech Republic's Barbora Krejcikova, as play resumes, following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 26, 2020 Czech Republic's Petra Kvitova wearing a face mask arrives for her match against Czech Republic's Barbora Krejcikova, as play resumes, following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 26, 2020 Czech Republic's Petra Kvitova and Czech Republic's Barbora Krejcikova arrive for their match wearing face masks, as play resumes, following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 26, 2020 Czech Republic's Barbora Krejcikova in action during her match against Czech Republic's Petra Kvitova, as play resumes, following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 26, 2020 A ball girl wearing a glove holds aloft a ball during the match between Czech Republic's Petra Kvitova and Czech Republic's Barbora Krejcikova, as play resumes, following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny TPX IMAGES OF THE DAY

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 26, 2020 Czech Republic's Petra Kvitova during her match against Czech Republic's Barbora Krejcikova, as play resumes, following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 26, 2020 Czech Republic's Petra Kvitova in action during her match against Czech Republic's Barbora Krejcikova, as play resumes, following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 26, 2020 Czech Republic's Petra Kvitova during her match against Czech Republic's Barbora Krejcikova, as play resumes, following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 26, 2020 Czech Republic's Petra Kvitova in action during her match against Czech Republic's Barbora Krejcikova, as play resumes, following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 26, 2020 Czech Republic's Petra Kvitova in action during her match against Czech Republic's Barbora Krejcikova, as play resumes, following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 26, 2020 Czech Republic's Petra Kvitova in action during her match against Czech Republic's Barbora Krejcikova, as play resumes, following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 26, 2020 Czech Republic's Petra Kvitova in action during her match against Czech Republic's Barbora Krejcikova, as play resumes, following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 26, 2020 Czech Republic's Barbora Strycova in action during her match against Czech Republic's Linda Fruhvirtova, as play resumes behind closed doors following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 26, 2020 Czech Republic's Barbora Strycova in action during her match against Czech Republic's Linda Fruhvirtova, as play resumes behind closed doors following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 26, 2020 Czech Republic's Barbora Strycova in action during her match against Czech Republic's Linda Fruhvirtova, as play resumes behind closed doors following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 26, 2020 Czech Republic's Barbora Strycova in action during her match against Czech Republic's Linda Fruhvirtova, as play resumes behind closed doors following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 26, 2020 Czech Republic's Barbora Strycova in action during her match against Czech Republic's Linda Fruhvirtova, as play resumes behind closed doors following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 26, 2020 Czech Republic's Linda Fruhvirtova in action during her match against Czech Republic's Barbora Strycova, as play resumes behind closed doors following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 26, 2020 Czech Republic's Linda Fruhvirtova wearing a face mask before her match against Czech Republic's Barbora Strycova, as play resumes behind closed doors following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 26, 2020 A ballgirl wearing a face mask and gloves retrieves a ball during the match between Czech Republic's Kristyna Pliskova and Czech Republic's Karolina Muchova, as play resumes, following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 26, 2020 A ballgirl wearing a face mask and gloves passes a ball during the match between Czech Republic's Kristyna Pliskova and Czech Republic's Karolina Muchova, as play resumes, following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 26, 2020 A ballgirl wearing a face mask and gloves looks on as Czech Republic's Kristyna Pliskova prepares to serve during her match against Czech Republic's Karolina Muchova, as play resumes, following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 26, 2020 A ballgirl wearing a face mask and gloves passes a ball to Czech Republic's Kristyna Pliskova during her match against Czech Republic's Karolina Muchova, as play resumes, following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 26, 2020 Ballgirls wearing gloves hold balls during the match between Czech Republic's Karolina Muchova and Czech Republic's Kristyna Pliskova, as play resumes, following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 26, 2020 A ballgirl wearing gloves holds a ball during the match between Czech Republic's Karolina Muchova and Czech Republic's Kristyna Pliskova, as play resumes, following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 26, 2020 A ballgirl wearing gloves prepares balls during the match between Czech Republic's Karolina Muchova and Czech Republic's Kristyna Pliskova, as play resumes, following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 26, 2020 Czech Republic's Karolina Muchova in action during her match against Czech Republic's Petra Kvitova, as play resumes, following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny

Tennis - All-Czech Tennis Tournament - TK Sparta Prague, Prague, Czech Republic, May 26, 2020 Czech Republic's Karolina Muchova in action during her match against Czech Republic's Petra Kvitova, as play resumes, following the outbreak of the coronavirus disease (COVID-19) REUTERS/David W Cerny