![Kim Clijsters (L) of Belgium hugs Caroline Wozniacki of Denmark after she defeated Wozniacki in the women's singles final match at the U.S. Open tennis tournament in New York, September 13, 2009. Kim Clijsters (L) of Belgium hugs Caroline Wozniacki of Denmark after she defeated Wozniacki in the women's singles final match at the U.S. Open tennis tournament in New York, September 13, 2009.](https://c8.alamy.com/comp/2E7WF2P/kim-clijsters-l-of-belgium-hugs-caroline-wozniacki-of-denmark-after-she-defeated-wozniacki-in-the-womens-singles-final-match-at-the-us-open-tennis-tournament-in-new-york-september-13-2009-reutersshaun-best-united-states-sport-tennis-2E7WF2P.jpg)
Kim Clijsters (L) of Belgium hugs Caroline Wozniacki of Denmark after she defeated Wozniacki in the women's singles final match at the U.S. Open tennis tournament in New York, September 13, 2009.
![Kateryna Bondarenko of Ukraine returns the ball to Yanina Wickmayer of Belgium during their quarter-final Kateryna Bondarenko of Ukraine returns the ball to Yanina Wickmayer of Belgium during their quarter-final](https://c8.alamy.com/comp/TYKCBH/kateryna-bondarenko-of-ukraine-returns-the-ball-to-yanina-wickmayer-of-belgium-during-their-quarter-final-match-at-the-us-open-tennis-championship-on-september-9-2009-in-new-york-upi-monika-graff-TYKCBH.jpg)
Kateryna Bondarenko of Ukraine returns the ball to Yanina Wickmayer of Belgium during their quarter-final
![Caroline Wozniacki of Denmark reacts as she scores a point off of Kim Clijsters of Belgium during the women's final match at the US Open Tennis Championship on September 13, 2009 in Caroline Wozniacki of Denmark reacts as she scores a point off of Kim Clijsters of Belgium during the women's final match at the US Open Tennis Championship on September 13, 2009 in](https://c8.alamy.com/comp/TYKD33/caroline-wozniacki-of-denmark-reacts-as-she-scores-a-point-off-of-kim-clijsters-of-belgium-during-the-womens-final-match-at-the-us-open-tennis-championship-on-september-13-2009-in-new-york-upijohnangelillo-TYKD33.jpg)
Caroline Wozniacki of Denmark reacts as she scores a point off of Kim Clijsters of Belgium during the women's final match at the US Open Tennis Championship on September 13, 2009 in
![Serena Williams of the U.S. yells at a line judge after being called for a foot foul during her semi-final match against Kim Clijsters of Belgium at the U.S. Open tennis tournament Serena Williams of the U.S. yells at a line judge after being called for a foot foul during her semi-final match against Kim Clijsters of Belgium at the U.S. Open tennis tournament](https://c8.alamy.com/compfr/2e8e6p5/serena-williams-of-the-u-s-yells-at-a-line-judge-after-being-called-for-a-foot-foul-during-her-semi-final-match-against-kim-clijsters-of-belgium-at-the-u-s-open-tennis-tournament-in-new-york-september-12-2009-clijsters-won-the-match-6-4-7-5-which-ended-in-controversy-when-williams-was-called-for-a-foot-fault-on-a-second-serve-to-go-match-point-down-reuters-shaun-best-united-states-sport-tennis-images-of-the-day-2e8e6p5.jpg)
Serena Williams of the U.S. yells at a line judge after being called for a foot foul during her semi-final match against Kim Clijsters of Belgium at the U.S. Open tennis tournament
![Kim Clijsters of Belgium and her daughter Jada pose with the trophy after she defeated Caroline Wozniacki of Denmark in the women's singles final match at the U.S. Open tennis tournament in Kim Clijsters of Belgium and her daughter Jada pose with the trophy after she defeated Caroline Wozniacki of Denmark in the women's singles final match at the U.S. Open tennis tournament in](https://c8.alamy.com/comp/2E8G8YJ/kim-clijsters-of-belgium-and-her-daughter-jada-pose-with-the-trophy-after-she-defeated-caroline-wozniacki-of-denmark-in-the-womens-singles-final-match-at-the-us-open-tennis-tournament-in-new-york-september-13-2009-reuterskevin-lamarque-united-states-sport-tennis-2E8G8YJ.jpg)