Athletics - Diamond League - Rome/Florence - 2021 Pietro Mennea Golden Gala - Stadio Luigi Ridolfi, Florence, Italy - June 10, 2021 Colombia's Anthony Jose Zambrano celebrates winning the men's 400m REUTERS/Ciro De Luca

Athletics - Diamond League - Rome/Florence - 2021 Pietro Mennea Golden Gala - Stadio Luigi Ridolfi, Florence, Italy - June 10, 2021 Colombia's Anthony Jose Zambrano on his way to win the men's 400m REUTERS/Ciro De Luca

Athletics - German Athletics Championships - Eintracht-Stadion, Braunschweig, Germany - June 6, 2021 Germany's Corinna Schwab wins the women's 400m final REUTERS/Annegret Hilse

Athletics - German Athletics Championships - Eintracht-Stadion, Braunschweig, Germany - June 6, 2021 Germany's Laura Muller in action during the women's 400m final REUTERS/Annegret Hilse

Athletics - German Athletics Championships - Eintracht-Stadion, Braunschweig, Germany - June 6, 2021 Germany's Constantin Preis celebrates after winning the men's 400m hurdles REUTERS/Annegret Hilse

Athletics - German Athletics Championships - Eintracht-Stadion, Braunschweig, Germany - June 6, 2021 Germany's Carolina Krafzik reacts after the women's 400m hurdles REUTERS/Annegret Hilse

Athletics - German Athletics Championships - Eintracht-Stadion, Braunschweig, Germany - June 6, 2021 Germany's Carolina Krafzik reacts after the women's 400m hurdles REUTERS/Annegret Hilse

Athletics - German Athletics Championships - Eintracht-Stadion, Braunschweig, Germany - June 6, 2021 Germany's Carolina Krafzik reacts after the women's 400m hurdles REUTERS/Annegret Hilse

Athletics - German Athletics Championships - Eintracht-Stadion, Braunschweig, Germany - June 5, 2021 General view of spectators sat in the stands during the men's 400m hurdles REUTERS/Annegret Hilse

Athletics - European Athletics Team Championships - Silesian Stadium, Chorzow, Poland - May 30, 2021 Poland's Mateusz Siuda, Dominik Kopec, Adrian Brzezinski and Przemyslaw Slowikowski pose for a photograph after finishing fourth in the men's 4 x 400m relay final REUTERS/Aleksandra Szmigiel

Athletics - European Athletics Team Championships - Silesian Stadium, Chorzow, Poland - May 30, 2021 Spain's Andrea Jimenez, Laura Bueno, Barbara Camblor and Aauri Lorena Bokesa pose for a photograph after finishing fifth in the women's 4 x 400m relay final REUTERS/Aleksandra Szmigiel

Athletics - European Athletics Team Championships - Silesian Stadium, Chorzow, Poland - May 30, 2021 Poland Malgorzata Holub-Kowalik, Kornelia Lesiewicz, Justyna Swiety-Ersetic and Natalia Kaczmarek celebrate winning the women's 4 x 400m relay final REUTERS/Aleksandra Szmigiel

Athletics - European Athletics Team Championships - Silesian Stadium, Chorzow, Poland - May 30, 2021 Great Britain's Lina Nielsen, Yasmin Liverpool, Hannah Williams and Ama Pipi celebrate after finishing second in the women's 4 x 400m final REUTERS/Aleksandra Szmigiel

Athletics - European Athletics Team Championships - Silesian Stadium, Chorzow, Poland - May 30, 2021 Italy's Vladimir Aceti in action as he crosses the line to win the men's 4 x 400m final REUTERS/Aleksandra Szmigiel

Athletics - European Athletics Team Championships - Silesian Stadium, Chorzow, Poland - May 30, 2021 Italy's Vladimir Aceti celebrates as he crosses the line to win the men's 4 x 400m final REUTERS/Aleksandra Szmigiel

Athletics - European Athletics Team Championships - Silesian Stadium, Chorzow, Poland - May 30, 2021 Italy's Alessandro Sibilio celebrates winning the men's 4 x 400m final REUTERS/Aleksandra Szmigiel

Athletics - European Athletics Team Championships - Silesian Stadium, Chorzow, Poland - May 30, 2021 Italy's Vladimir Aceti celebrates as he crosses the line to win the men's 4 x 400m final REUTERS/Aleksandra Szmigiel

Athletics - European Athletics Team Championships - Silesian Stadium, Chorzow, Poland - May 30, 2021 Italy's Vladimir Aceti celebrates winning the men's 4 x 400m final REUTERS/Aleksandra Szmigiel

Athletics - European Athletics Team Championships - Silesian Stadium, Chorzow, Poland - May 30, 2021 Poland's Natalia Kaczmarek in action on her way to winning the women's 4 x 400m final REUTERS/Aleksandra Szmigiel

Athletics - European Athletics Team Championships - Silesian Stadium, Chorzow, Poland - May 30, 2021 Poland's Natalia Kaczmarek in action on her way to winning the women's 4 x 400m final REUTERS/Aleksandra Szmigiel

Athletics - European Athletics Team Championships - Silesian Stadium, Chorzow, Poland - May 30, 2021 Poland's Natalia Kaczmarek in action on her way to winning the women's 4 x 400m final REUTERS/Aleksandra Szmigiel

Athletics - European Athletics Team Championships - Silesian Stadium, Chorzow, Poland - May 30, 2021 Poland's Natalia Kaczmarek during the women's 4 x 400m final REUTERS/Aleksandra Szmigiel

Athletics - European Athletics Team Championships - Silesian Stadium, Chorzow, Poland - May 29, 2021 Portugal's Catia Azevedo looks up at the board after finishing forth in the women's 400m final REUTERS/Aleksandra Szmigiel

Athletics - European Athletics Team Championships - Silesian Stadium, Chorzow, Poland - May 29, 2021 Spain's Samuel Garcia reacts after finishing fourth in the men's 400m final REUTERS/Aleksandra Szmigiel

Athletics - European Athletics Team Championships - Silesian Stadium, Chorzow, Poland - May 29, 2021 France's Thomas Jordier celebrates winning the men's 400m final REUTERS/Aleksandra Szmigiel

Athletics - European Athletics Team Championships - Silesian Stadium, Chorzow, Poland - May 29, 2021 Poland's Natalia Kaczmarek crosses the line to win the women's 400m final REUTERS/Aleksandra Szmigiel

Athletics - European Athletics Team Championships - Silesian Stadium, Chorzow, Poland - May 29, 2021 Spain's Aauri Bokesa reacts after finishing second in the women's 400m final REUTERS/Aleksandra Szmigiel

Athletics - European Athletics Team Championships - Silesian Stadium, Chorzow, Poland - May 29, 2021 Poland's Natalia Kaczmarek reacts after winning the women's 400m final REUTERS/Aleksandra Szmigiel

Athletics - European Athletics Team Championships - Silesian Stadium, Chorzow, Poland - May 29, 2021 Spain's Aauri Bokesa reacts after finishing second in the women's 400m final REUTERS/Aleksandra Szmigiel TPX IMAGES OF THE DAY

Athletics - European Athletics Team Championships - Silesian Stadium, Chorzow, Poland - May 29, 2021 Great Britain's Lina Nielsen celebrates after winning the women's 400m hurdles final REUTERS/Aleksandra Szmigiel

Athletics - European Athletics Team Championships - Silesian Stadium, Chorzow, Poland - May 29, 2021 Great Britain's Lina Nielsen reacts after winning the women's 400m hurdles final REUTERS/Aleksandra Szmigiel

Athletics - European Athletics Team Championships - Silesian Stadium, Chorzow, Poland - May 29, 2021 Great Britain's Lina Nielsen wins the womens 400m hurdles final REUTERS/Aleksandra Szmigiel

Athletics - European Athletics Team Championships - Silesian Stadium, Chorzow, Poland - May 29, 2021 Italy's Alessandro Sibilio wins the mens 400m hurdles final REUTERS/Aleksandra Szmigiel

Athletics - Diamond League - Doha - Suhaim bin Hamad Stadium, Doha, Qatar - May 28, 2021 Michael Norman of U.S. in action during the men's 400m REUTERS/Ibraheem Al Omari

Athletics - Diamond League - Doha - Suhaim bin Hamad Stadium, Doha, Qatar - May 28, 2021 Michael Norman of U.S. posing with a world lead sign after winning the men's 400m REUTERS/Ibraheem Al Omari

Athletics - Diamond League - Doha - Suhaim bin Hamad Stadium, Doha, Qatar - May 28, 2021 Rai Benjamin of the U.S. poses with the stadium record after winning the Men's 400m hurdles REUTERS/Ibraheem Al Omari

Athletics - Diamond League - Doha - Suhaim bin Hamad Stadium, Doha, Qatar - May 28, 2021 Rai Benjamin of the U.S. wins the Men's 400m hurdles REUTERS/Ibraheem Al Omari

Athletics - Diamond League - Doha - Suhaim bin Hamad Stadium, Doha, Qatar - May 28, 2021 Rai Benjamin of the U.S. wins the Men's 400m hurdles REUTERS/Ibraheem Al Omari

Athletics - Diamond League - Gateshead - Gateshead International Stadium, Gateshead, Britain - May 23, 2021 Kendall Ellis of the U.S. celebrates winning the women's 400m final REUTERS/Lee Smith

Athletics - Diamond League - Gateshead - Gateshead International Stadium, Gateshead, Britain - May 23, 2021 Kendall Ellis of the U.S. on her way to winning the women's 400m final alongside second placed Jamaica's Stephenie Ann McPherson REUTERS/Lee Smith

Athletics - Diamond League - Gateshead - Gateshead International Stadium, Gateshead, Britain - May 23, 2021 Jamaica's Shericka Jackson reacts after the women's 400m final REUTERS/Lee Smith

22 year-old singer-songwriter and 400-meter track athlete Chloe Abbott is hoping to qualify for the Tokyo Olympics as she warms-up before competing in the Women?s 400m event in Irvine, California, U.S., May 15, 2021. Picture taken May 15, 2021. REUTERS/Mike Blake

22 year-old singer-songwriter and 400-meter track athlete, Chloe Abbott is hoping to qualify for the Tokyo Olympics as she warms-up before completing in the Women?s 400m event in Irvine, California, U.S., May 15, 2021. Picture taken May 15, 2021. REUTERS/Mike Blake

22 year-old singer-songwriter and 400-meter track athlete, Chloe Abbott, hoping to qualify for the Tokyo Olympics, walks to her starting position before competing in the Women?s 400m event in Irvine, California, U.S., May 15, 2021. Picture taken May 15, 2021. REUTERS/Mike Blake

22 year-old singer-songwriter and 400-meter track athlete Chloe Abbott, hoping to qualify for the Tokyo Olympics, completes in the Women?s 400m event in Irvine, California, U.S., May 15, 2021. Picture taken May 15, 2021. REUTERS/Mike Blake

22 year-old singer-songwriter and 400-meter track athlete Chloe Abbott, hoping to qualify for the Tokyo Olympics, stands over her starting blocks before competing in the Women?s 400m event in Irvine, California, U.S., May 15, 2021. Picture taken May 15, 2021. REUTERS/Mike Blake

22 year-old singer-songwriter and 400-meter track athlete, Chloe Abbott, hoping to qualify for the Tokyo Olympics, walks to her starting position before competing in the Women’s 400m event in Irvine, California, U.S., May 15, 2021. Picture taken May 15, 2021. REUTERS/Mike Blake

22 year-old singer-songwriter and 400-meter track athlete Chloe Abbott, hoping to qualify for the Tokyo Olympics, walks to her starting position before competing in the Women?s 400m event in Irvine, California, U.S., May 15, 2021. Picture taken May 15, 2021. REUTERS/Mike Blake

22 year-old singer-songwriter and 400-meter track athlete Chloe Abbott, hoping to qualify for the Tokyo Olympics, competes in the Women?s 400m event in Irvine, California, U.S., May 15, 2021. Picture taken May 15, 2021. REUTERS/Mike Blake

22 year-old singer-songwriter and 400-meter track athlete Chloe Abbott, hoping to qualify for the Tokyo Olympics, competes in the Women’s 400m event in Irvine, California, U.S., May 15, 2021. Picture taken May 15, 2021. REUTERS/Mike Blake

22 year-old singer-songwriter and 400-meter track athlete Chloe Abbott is hoping to qualify for the Tokyo Olympics as she warms-up before competing in the Women?s 400m event in Irvine, California, U.S., May 15, 2021. Picture taken May 15, 2021. REUTERS/Mike Blake

22 year-old singer-songwriter and 400-meter track athlete Chloe Abbott reads in her journal as she warms-up before competing in the Women’s 400m event in Irvine, California, U.S., May 15, 2021. Picture taken May 15, 2021. REUTERS/Mike Blake

22 year-old singer-songwriter and 400-meter track athlete Chloe Abbott, hoping to qualify for the Tokyo Olympics, competes in the Women?s 400m event in Irvine, California, U.S., May 15, 2021. Picture taken May 15, 2021. REUTERS/Mike Blake

22 year-old singer-songwriter and 400-meter track athlete Chloe Abbott is hoping to qualify for the Tokyo Olympics as she warms-up before competing in the Women?s 400m event in Irvine, California, U.S., May 15, 2021. Picture taken May 15, 2021. REUTERS/Mike Blake

Olympics - Tokyo 2020 Olympic Games Test Event - Athletics - Olympic Stadium, Tokyo, Japan - May 9, 2021 Japan's Masaki Toyoda, Brazil's Mahau Suguimati and Takahumi Iwasaki in action during the men's 400m hurdles final REUTERS/Kim Kyung-Hoon

Olympics - Tokyo 2020 Olympic Games Test Event - Athletics - Olympic Stadium, Tokyo, Japan - May 9, 2021 Japan's Kentaro Sato wins the men's 400m final REUTERS/Kim Kyung-Hoon

Olympics - Tokyo 2020 Olympic Games Test Event - Athletics - Olympic Stadium, Tokyo, Japan - May 9, 2021 Britain's Rabah Yousif in action during the men's 400m final REUTERS/Issei Kato

Olympics - Tokyo 2020 Olympic Games Test Event - Athletics - Olympic Stadium, Tokyo, Japan - May 9, 2021 Britain's Rabah Yousif reacts after the men's 400m final REUTERS/Kim Kyung-Hoon

Olympics - Tokyo 2020 Olympic Games Test Event - Athletics - Olympic Stadium, Tokyo, Japan - May 9, 2021 General view during the women's 400m final REUTERS/Issei Kato

Olympics - Tokyo 2020 Olympic Games Test Event - Athletics - Olympic Stadium, Tokyo, Japan - May 9, 2021 Japan's Mayu Kobayashi celebrates winning the women's 400m final REUTERS/Kim Kyung-Hoon