Caroline Wozniacki of Denmark, left talks to Anna Chakvetadze of Russia after she collapsed on the court during the match on the third day of the Emirates Dubai WTA Tennis Championships in Dubai, United Arab Emirates Wednesday, Feb. 16, 2011. Chakvetadze had to retire from her match with top-seeded Caroline Wozniacki .,Image: 595655961, License: Rights-managed, Restrictions: This content is intended for editorial use only. For other uses, additional clearances may be required., Model Release: no, Pictured: Anna Chakvetadze,Caroline Wozniacki

Russia's Anna Chakvetadze receives medical treatment after she collapsed in a match against Caroline Wozniacki from Denmark during the third day of Dubai WTA Tennis Championships in Dubai, United Arab Emirates, Wednesday Feb. 16, 2011. Chakvetadze had to retire from her match with top-seeded Caroline Wozniacki .,Image: 595655979, License: Rights-managed, Restrictions: This content is intended for editorial use only. For other uses, additional clearances may be required., Model Release: no, Pictured: Anna Chakvetadze,Caroline Wozniacki