Aug 4, 2017; Washington, DC, USA; Sabine Lisicki of Germany hits a forehand against Oceane Dodin of France (not pictured) on day five of the Citi Open at Fitzgerald Tennis Center. Dodin won 5-7, 6-4, 7-6(4). Mandatory Credit: Geoff Burke-USA TODAY Sports

Aug 4, 2017; Washington, DC, USA; Oceane Dodin of France hits a backhand against Sabine Lisicki of Germany (not pictured) on day five of the Citi Open at Fitzgerald Tennis Center. Dodin won 5-7, 6-4, 7-6(4). Mandatory Credit: Geoff Burke-USA TODAY Sports

Aug 4, 2017; Washington, DC, USA; Oceane Dodin of France celebrates after her match against Sabine Lisicki of Germany (not pictured) on day five of the Citi Open at Fitzgerald Tennis Center. Dodin won 5-7, 6-4, 7-6(4). Mandatory Credit: Geoff Burke-USA TODAY Sports

Aug 4, 2017; Washington, DC, USA; Oceane Dodin of France (L) hugs Sabine Lisicki of Germany (R) after their match on day five of the Citi Open at Fitzgerald Tennis Center. Dodin won 5-7, 6-4, 7-6(4). Mandatory Credit: Geoff Burke-USA TODAY Sports

Aug 2, 2017; Washington, DC, USA; Valentini Grammatikopoulou of Greece hits a forehand against Sabine Lisicki of Germany (not pictured) on day three of the Citi Open at Fitzgerald Tennis Center. Lisicki won 7-6(7), 7-6(5). Mandatory Credit: Geoff Burke-USA TODAY Sports

Aug 2, 2017; Washington, DC, USA; Sabine Lisicki of Germany reacts after winning the first set against Valentini Grammatikopoulou of Greece (not pictured) on day three of the Citi Open at Fitzgerald Tennis Center. Lisicki won 7-6(7), 7-6(5). Mandatory Credit: Geoff Burke-USA TODAY Sports

Aug 2, 2017; Washington, DC, USA; Valentini Grammatikopoulou of Greece hits a forehand against Sabine Lisicki of Germany (not pictured) on day three of the Citi Open at Fitzgerald Tennis Center. Lisicki won 7-6(7), 7-6(5). Mandatory Credit: Geoff Burke-USA TODAY Sports

Aug 2, 2017; Washington, DC, USA; Sabine Lisicki of Germany hits a forehand against Valentini Grammatikopoulou of Greece (not pictured) on day three of the Citi Open at Fitzgerald Tennis Center. Lisicki won 7-6(7), 7-6(5). Mandatory Credit: Geoff Burke-USA TODAY Sports

Aug 2, 2017; Washington, DC, USA; Sabine Lisicki of Germany hits a backhand against Valentini Grammatikopoulou of Greece (not pictured) on day three of the Citi Open at Fitzgerald Tennis Center. Lisicki won 7-6(7), 7-6(5). Mandatory Credit: Geoff Burke-USA TODAY Sports

Jul 24, 2016; Montreal, Quebec, Canada; Magda Linette of Poland hits a shot against Sabine Lisicki (not pictured) of Germany during the Rogers Cup tennis tournament at Uniprix Stadium. Mandatory Credit: Jean-Yves Ahern-USA TODAY Sports

Jul 24, 2016; Montreal, Quebec, Canada; Sabine Lisicki of Germany hits a shot against Magda Linette (not pictured) of Poland during the Rogers Cup tennis tournament at Uniprix Stadium. Mandatory Credit: Jean-Yves Ahern-USA TODAY Sports

Britain Tennis - Wimbledon - All England Lawn Tennis & Croquet Club, Wimbledon, England - 30/6/16 Germany's Sabine Lisicki in action against Australia's Samantha Stosur REUTERS/Paul Childs

Britain Tennis - Wimbledon - All England Lawn Tennis & Croquet Club, Wimbledon, England - 30/6/16 Germany's Sabine Lisicki during her match against Australia's Samantha Stosur REUTERS/Paul Childs

Britain Tennis - Wimbledon - All England Lawn Tennis & Croquet Club, Wimbledon, England - 30/6/16 Germany's Sabine Lisicki in action against Australia's Samantha Stosur REUTERS/Paul Childs

Britain Tennis - Wimbledon - All England Lawn Tennis & Croquet Club, Wimbledon, England - 30/6/16 Germany's Sabine Lisicki in action against Australia's Samantha Stosur REUTERS/Paul Childs

Britain Tennis - Wimbledon - All England Lawn Tennis & Croquet Club, Wimbledon, England - 27/6/16 Germany's Sabine Lisicki during her match against USA's Shelby Rogers REUTERS/Stefan Wermuth

Britain Tennis - Wimbledon - All England Lawn Tennis & Croquet Club, Wimbledon, England - 27/6/16 USA's Shelby Rogers is reflected in the commentary box window during her rmatch against Germany's Sabine Lisicki REUTERS/Stefan Wermuth

Britain Tennis - Wimbledon - All England Lawn Tennis & Croquet Club, Wimbledon, England - 27/6/16 USA's Shelby Rogers is reflected in the commentary box window during her rmatch against Germany's Sabine Lisicki REUTERS/Stefan Wermuth

Britain Tennis - Wimbledon - All England Lawn Tennis & Croquet Club, Wimbledon, England - 27/6/16 Germany's Sabine Lisicki in action against USA's Shelby Rogers REUTERS/Stefan Wermuth

Britain Tennis - Wimbledon - All England Lawn Tennis & Croquet Club, Wimbledon, England - 27/6/16 Germany's Sabine Lisicki in action against USA's Shelby Rogers REUTERS/Stefan Wermuth

Britain Tennis - Wimbledon - All England Lawn Tennis & Croquet Club, Wimbledon, England - 27/6/16 Germany's Sabine Lisicki celebrates after winning her match against USA's Shelby Rogers REUTERS/Stefan Wermuth

Britain Tennis - Wimbledon - All England Lawn Tennis & Croquet Club, Wimbledon, England - 27/6/16 Germany's Sabine Lisicki celebrates after winning her match against USA's Shelby Rogers REUTERS/Stefan Wermuth

Britain Tennis - Wimbledon - All England Lawn Tennis & Croquet Club, Wimbledon, England - 27/6/16 Germany's Sabine Lisicki celebrates after winning her match against USA's Shelby Rogers REUTERS/Stefan Wermuth

Britain Tennis - Wimbledon - All England Lawn Tennis & Croquet Club, Wimbledon, England - 27/6/16 Germany's Sabine Lisicki shakes hands with USA's Shelby Rogers after winning their match REUTERS/Stefan Wermuth

Britain Tennis - Wimbledon - All England Lawn Tennis & Croquet Club, Wimbledon, England - 27/6/16 Spectators watch the match between Germany's Sabine Lisicki and USA's Shelby Rogers REUTERS/Stefan Wermuth

Britain Tennis - Wimbledon - All England Lawn Tennis & Croquet Club, Wimbledon, England - 27/6/16 Spectators watch the match between Germany's Sabine Lisicki and USA's Shelby Rogers REUTERS/Stefan Wermuth

Britain Tennis - Wimbledon - All England Lawn Tennis & Croquet Club, Wimbledon, England - 27/6/16 Spectators watch the match between Germany's Sabine Lisicki and USA's Shelby Rogers REUTERS/Stefan Wermuth

Tennis - Madrid Open - Carla Suarez Navarro of Spain v Sabine Lisicki of Germany - Madrid, Spain - 3/5/16 Suarez Navarro serves. REUTERS/Susana Vera

Tennis - Madrid Open - Carla Suarez Navarro of Spain v Sabine Lisicki of Germany - Madrid, Spain - 3/5/16 Suarez Navarro returns the ball. REUTERS/Susana Vera

Tennis - Madrid Open - Carla Suarez Navarro of Spain v Sabine Lisicki of Germany - Madrid, Spain - 3/5/16 Lisicki serves. REUTERS/Susana Vera

Tennis - Madrid Open - Carla Suarez Navarro of Spain v Sabine Lisicki of Germany - Madrid, Spain - 3/5/16 Lisicki reacts. REUTERS/Susana Vera

Czech Republic's Denisa Allertova reacts during her second round match against Germany's Sabine Lisicki at the Australian Open tennis tournament at Melbourne Park, Australia, January 21, 2016. REUTERS/Brandon Malone

Czech Republic's Denisa Allertova (R) shakes hands with Germany's Sabine Lisicki after Allertova won their second round match at the Australian Open tennis tournament at Melbourne Park, Australia, January 21, 2016. REUTERS/Brandon Malone

Czech Republic's Denisa Allertova celebrates after winning her second round match against Germany's Sabine Lisicki at the Australian Open tennis tournament at Melbourne Park, Australia, January 21, 2016. REUTERS/Brandon Malone

Czech Republic's Denisa Allertova celebrates after winning her second round match against Germany's Sabine Lisicki at the Australian Open tennis tournament at Melbourne Park, Australia, January 21, 2016. REUTERS/Brandon Malone

German comedian Otto Walkes, tennis star Sabine Lisicki and comedian Oliver Pocher (L-R) arrive on the red carpet for the Bambi 2015 media awards ceremony in Berlin, Germany November 12, 2015. The annual Bambi awards honour celebrities from the world of entertainment, literature, sports and politics. REUTERS/Stefanie Loos

Simona Halep of Romania celebrates after defeating Sabine Lisicki of Germany in their fourth round match at the U.S. Open Championships tennis tournament in New York, September 7, 2015. REUTERS/Carlo Allegri

Sabine Lisicki of Germany stretches a leg muscle during her fourth round match against Simona Halep of Romania at the U.S. Open Championships tennis tournament in New York, September 7, 2015. REUTERS/Carlo Allegri

Simona Halep of Romania celebrates after defeating Sabine Lisicki of Germany in their fourth round match at the U.S. Open Championships tennis tournament in New York, September 7, 2015. REUTERS/Carlo Allegri

Simona Halep of Romania celebrates after defeating Sabine Lisicki of Germany in their fourth round match at the U.S. Open Championships tennis tournament in New York, September 7, 2015. REUTERS/Carlo Allegri

Simona Halep of Romania chases down a return to Sabine Lisicki of Germany during their fourth round match at the U.S. Open Championships tennis tournament in New York, September 7, 2015. REUTERS/Carlo Allegri

Simona Halep of Romania stretches a leg muscle after losing a point to Sabine Lisicki of Germany during their fourth round match at the U.S. Open Championships tennis tournament in New York, September 7, 2015. REUTERS/Carlo Allegri

Simona Halep of Romania chases down a return to Sabine Lisicki of Germany during their fourth round match at the U.S. Open Championships tennis tournament in New York, September 7, 2015. REUTERS/Carlo Allegri

Simona Halep of Romania serves to Sabine Lisicki of Germany during their fourth round match at the U.S. Open Championships tennis tournament in New York, September 7, 2015. REUTERS/Carlo Allegri

Simona Halep of Romania chases down a return to Sabine Lisicki of Germany during their fourth round match at the U.S. Open Championships tennis tournament in New York, September 7, 2015. REUTERS/Carlo Allegri

Simona Halep of Romania chases down a return to Sabine Lisicki of Germany during their fourth round match at the U.S. Open Championships tennis tournament in New York, September 7, 2015. REUTERS/Carlo Allegri

Simona Halep of Romania casts a shadow on the court during her fourth round match against Sabine Lisicki of Germany at the U.S. Open Championships tennis tournament in New York, September 7, 2015. REUTERS/Carlo Allegri

Sep 7, 2015; New York, NY, USA; Sabine Lisicki of Germany stretches between points in the third set of her match against Simona Halep of Romania on day eight of the 2015 U.S. Open tennis tournament at USTA Billie Jean King National Tennis Center. Mandatory Credit: Jerry Lai-USA TODAY Sports

Sep 7, 2015; New York, NY, USA; Sabine Lisicki of Germany stretches between points in the third set of her match against Simona Halep of Romania on day eight of the 2015 U.S. Open tennis tournament at USTA Billie Jean King National Tennis Center. Mandatory Credit: Jerry Lai-USA TODAY Sports

Sep 7, 2015; New York, NY, USA; Sabine Lisicki of Germany stretches between points in the third set of her match against Simona Halep of Romania on day eight of the 2015 U.S. Open tennis tournament at USTA Billie Jean King National Tennis Center. Mandatory Credit: Jerry Lai-USA TODAY Sports

Sep 7, 2015; New York, NY, USA; Simona Halep of Romania celebrates after winning a break point in the third set of her match against Sabine Lisicki of Germany on day eight of the 2015 U.S. Open tennis tournament at USTA Billie Jean King National Tennis Center. Mandatory Credit: Jerry Lai-USA TODAY Sports

Sep 7, 2015; New York, NY, USA; Simona Halep of Romania celebrates after defeating Sabine Lisicki of Germany on day eight of the 2015 U.S. Open tennis tournament at USTA Billie Jean King National Tennis Center. Mandatory Credit: Jerry Lai-USA TODAY Sports

Sep 7, 2015; New York, NY, USA; Simona Halep of Romania celebrates after defeating Sabine Lisicki of Germany on day eight of the 2015 U.S. Open tennis tournament at USTA Billie Jean King National Tennis Center. Mandatory Credit: Jerry Lai-USA TODAY Sports

Sep 7, 2015; New York, NY, USA; Simona Halep of Romania celebrates after defeating Sabine Lisicki of Germany on day eight of the 2015 U.S. Open tennis tournament at USTA Billie Jean King National Tennis Center. Mandatory Credit: Jerry Lai-USA TODAY Sports

Sep 7, 2015; New York, NY, USA; Sabine Lisicki of Germany returns a shot to Simona Halep of Romania on day eight of the 2015 U.S. Open tennis tournament at USTA Billie Jean King National Tennis Center. Mandatory Credit: Jerry Lai-USA TODAY Sports

Sep 7, 2015; New York, NY, USA; Sabine Lisicki of Germany returns a shot to Simona Halep of Romania on day eight of the 2015 U.S. Open tennis tournament at USTA Billie Jean King National Tennis Center. Mandatory Credit: Jerry Lai-USA TODAY Sports

Sep 7, 2015; New York, NY, USA; Simona Halep of Romania stretches on the court after a point in her match against Sabine Lisicki of Germany on day eight of the 2015 U.S. Open tennis tournament at USTA Billie Jean King National Tennis Center. Mandatory Credit: Jerry Lai-USA TODAY Sports

Sep 7, 2015; New York, NY, USA; Simona Halep of Romania reacts after winning the second set of her match against Sabine Lisicki of Germany on day eight of the 2015 U.S. Open tennis tournament at USTA Billie Jean King National Tennis Center. Mandatory Credit: Jerry Lai-USA TODAY Sports

Sep 7, 2015; New York, NY, USA; Sabine Lisicki of Germany returns a shot to Simona Halep of Romania on day eight of the 2015 U.S. Open tennis tournament at USTA Billie Jean King National Tennis Center. Mandatory Credit: Jerry Lai-USA TODAY Sports

Sep 7, 2015; New York, NY, USA; Sabine Lisicki of Germany returns a shot to Simona Halep of Romania on day eight of the 2015 U.S. Open tennis tournament at USTA Billie Jean King National Tennis Center. Mandatory Credit: Jerry Lai-USA TODAY Sports