Eugenie Bouchard of Canada receives medical attention during her first round match against Andrea Petkovic of Germany in the China Open tennis tournament at the National Tennis Stadium in Beijing, Monday.
Andy Roddick of the U.S. smashed his tennis racquet onto the court during his match against Kevin Anderson of South Africa in the China Open tennis tournament, at the National Tennis Center in Beijing Oct. 3, 2011. Mark Ralston/AFP/Getty Images
Spectators wearing masks watches the men's singles match between Tomas Berdych of Czech Republic and Pablo Cuevas of Uruguay on a polluted day at the China Open tennis tournament in Beijing, October 7, 2015. REUTERS/Kim Kyung-Hoon
Maria Sharapova of Russia shouts after getting a points during her match against Svetlana Kuznetsova of Russia at the China Open tennis tournament at the National Tennis Stadium in Beijing, China, Friday, Oct. 3, 2014. (AP Photo/Vincent Thian)
Jelena Jankovic of Serbia kisses her racket as she reacts after winning her women's singles semi-final match against Petra Kvitova of the Czech Republic at the China Open tennis tournament in Beijing October 5, 2013.
Rafael Nadal of Spain eyes the ball as he prepares to hit a return during his men's quarter-final match against Martin Klizan of Slovakia at the China Open tennis tournament in Beijing, October 3, 2014. (REUTERS/Jason Lee)
Novak Djokovic of Serbia celebrates after winning against Tomas Berdych of the Czech Republic during the men's singles final match at the China Open tennis tournament in Beijing October 5, 2014. (REUTERS/Petar Kujundzic)
Novak Djokovic of Serbia celebrates after winning against Andy Murray of Britain during their men's singles semi-final match at the China Open tennis tournament in Beijing October 4, 2014. (REUTERS/Petar Kujundzic)
WORLD #1 SERENA WILLIAMS CLAIMS 10TH TITLE OF 2013 IN BEIJING! ... Rena won her 2nd China Open with a 6-2, 6-2 victory over 2008 Champion Jelena Jankovic in the Nat'l Tennis Center. Serena: "I really love tennis so much and it's fans like the ones here in China who are so exciting to come to. The fans make me want to play, and they're so great here, so coming here is such a great opportunity." 10/6 #TEAMSERENA <3 #RenasArmy