![Angelique Kerber of Germany hits a forehand in the third set against Venus Williams in their second round match at the 2012 U.S. Open Tennis Championships in Arthur Ashe Stadium at the Angelique Kerber of Germany hits a forehand in the third set against Venus Williams in their second round match at the 2012 U.S. Open Tennis Championships in Arthur Ashe Stadium at the](https://c8.alamy.com/comp/TYN5RF/angelique-kerber-of-germany-hits-a-forehand-in-the-third-set-against-venus-williams-in-their-second-round-match-at-the-2012-us-open-tennis-championships-in-arthur-ashe-stadium-at-the-billie-jean-king-national-tennis-center-in-new-york-city-on-august-30-2012-upijohn-angelillo-TYN5RF.jpg)
Angelique Kerber of Germany hits a forehand in the third set against Venus Williams in their second round match at the 2012 U.S. Open Tennis Championships in Arthur Ashe Stadium at the
![Kaia Kanepi of Estonia reacts after her match point on the final of the Estoril Tennis Open beating Carla Suarez Navarro of Spain in Jamor May 5, 2012. REUTERS/Hugo Correia (PORTUGAL - Kaia Kanepi of Estonia reacts after her match point on the final of the Estoril Tennis Open beating Carla Suarez Navarro of Spain in Jamor May 5, 2012. REUTERS/Hugo Correia (PORTUGAL -](https://c8.alamy.com/comp/2E5X05J/kaia-kanepi-of-estonia-reacts-after-her-match-point-on-the-final-of-the-estoril-tennis-open-beating-carla-suarez-navarro-of-spain-in-jamor-may-5-2012-reutershugo-correia-portugal-tags-sport-tennis-2E5X05J.jpg)
Kaia Kanepi of Estonia reacts after her match point on the final of the Estoril Tennis Open beating Carla Suarez Navarro of Spain in Jamor May 5, 2012. REUTERS/Hugo Correia (PORTUGAL -
![Samantha Stosur of Australia reacts after winning a point in her victory against Marion Bartoli of France during their women's singles semi-final match at the Qatar Open tennis tournament in Doha February Samantha Stosur of Australia reacts after winning a point in her victory against Marion Bartoli of France during their women's singles semi-final match at the Qatar Open tennis tournament in Doha February](https://c8.alamy.com/comp/2CYX45J/samantha-stosur-of-australia-reacts-after-winning-a-point-in-her-victory-against-marion-bartoli-of-france-during-their-womens-singles-semi-final-match-at-the-qatar-open-tennis-tournament-in-doha-february-18-2012-bartoli-pulled-out-of-the-semifinal-when-she-was-trailing-6-3-0-0-reutersfadi-al-assaad-qatar-tags-sport-tennis-2CYX45J.jpg)
Samantha Stosur of Australia reacts after winning a point in her victory against Marion Bartoli of France during their women's singles semi-final match at the Qatar Open tennis tournament in Doha February
![Britain's Andy Murray reacts after losing a point to Serbia's Novak Djokovic during their men's singles tennis match at the ATP World Tour Finals in the O2 Arena in London November 7, Britain's Andy Murray reacts after losing a point to Serbia's Novak Djokovic during their men's singles tennis match at the ATP World Tour Finals in the O2 Arena in London November 7,](https://c8.alamy.com/comp/2E5RARH/britains-andy-murray-reacts-after-losing-a-point-to-serbias-novak-djokovic-during-their-mens-singles-tennis-match-at-the-atp-world-tour-finals-in-the-o2-arena-in-london-november-7-2012-reutersdylan-martinez-britain-tags-sport-tennis-2E5RARH.jpg)
Britain's Andy Murray reacts after losing a point to Serbia's Novak Djokovic during their men's singles tennis match at the ATP World Tour Finals in the O2 Arena in London November 7,
![Kaia Kanepi of Estonia reacts after miss a point against Carla Suarez Navarro of Spain during their women's singles final match at the Estoril Tennis Open in Jamor May 5, 2012. REUTERS/Hugo Kaia Kanepi of Estonia reacts after miss a point against Carla Suarez Navarro of Spain during their women's singles final match at the Estoril Tennis Open in Jamor May 5, 2012. REUTERS/Hugo](https://c8.alamy.com/comp/2E5KFG9/kaia-kanepi-of-estonia-reacts-after-miss-a-point-against-carla-suarez-navarro-of-spain-during-their-womens-singles-final-match-at-the-estoril-tennis-open-in-jamor-may-5-2012-reutershugo-correia-portugal-tags-sport-tennis-2E5KFG9.jpg)
Kaia Kanepi of Estonia reacts after miss a point against Carla Suarez Navarro of Spain during their women's singles final match at the Estoril Tennis Open in Jamor May 5, 2012. REUTERS/Hugo
![Russia's Maria Sharapova celebrates a point against Spain's Silvia Soler-Espinosa during their Fed Cup World Group first round tennis match in Moscow February 4, 2012. REUTERS/Grigory Dukor (RUSSIA - Tags: SPORT TENNIS Russia's Maria Sharapova celebrates a point against Spain's Silvia Soler-Espinosa during their Fed Cup World Group first round tennis match in Moscow February 4, 2012. REUTERS/Grigory Dukor (RUSSIA - Tags: SPORT TENNIS](https://c8.alamy.com/comp/2CYEDXA/russias-maria-sharapova-celebrates-a-point-against-spains-silvia-soler-espinosa-during-their-fed-cup-world-group-first-round-tennis-match-in-moscow-february-4-2012-reutersgrigory-dukor-russia-tags-sport-tennis-2CYEDXA.jpg)
Russia's Maria Sharapova celebrates a point against Spain's Silvia Soler-Espinosa during their Fed Cup World Group first round tennis match in Moscow February 4, 2012. REUTERS/Grigory Dukor (RUSSIA - Tags: SPORT TENNIS
![Angelique Kerber of Germany reacts after match point in her second round match against Venus Williams at the 2012 U.S. Open Tennis Championships in Arthur Ashe Stadium at the Billie Jean King Angelique Kerber of Germany reacts after match point in her second round match against Venus Williams at the 2012 U.S. Open Tennis Championships in Arthur Ashe Stadium at the Billie Jean King](https://c8.alamy.com/comp/TYN5RJ/angelique-kerber-of-germany-reacts-after-match-point-in-her-second-round-match-against-venus-williams-at-the-2012-us-open-tennis-championships-in-arthur-ashe-stadium-at-the-billie-jean-king-national-tennis-center-in-new-york-city-on-august-30-2012-kerber-defeated-williams-6-2-5-7-7-5-upijohn-angelillo-TYN5RJ.jpg)