World's number one player, Switzerland's Roger Federer prepares to serve a ball against Argentina's David Nalbandian (unseen) during the opening match for the Shanghai Tennis Masters Cup held at the Qi Zhong, player number one 2

Download this stock image: World's number one player, Switzerland's Roger Federer prepares to serve a ball against Argentina's David Nalbandian (unseen) during the opening match for the Shanghai Tennis Masters Cup held at the Qi Zhong stadium in Shanghai, China, Sunday, Nov 13, 2005. The round robin competition featuring some of the world's top singles and doubles players with a prize money of US$4.45 million ends next Sunday. Federer wins 6-3, 2-6, 6-4. (AP Photo/Ng Han Guan) - 2PDK5KE from Alamy's library of millions of high resolution stock photos, illustrations and vectors.

World's number one player, Switzerland's Roger Federer adjusts his head band during a match against Argentina's David Nalbandian (unseen) for the Shanghai Tennis Masters Cup held at the Qi Zhong stadium in

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World's number one player, Switzerland's Roger Federer adjusts his head band during a match against Argentina's David Nalbandian (unseen) for the Shanghai Tennis Masters Cup held at the Qi Zhong stadium in

Roger Federer of Switzerland acknowledges the crowd after defeating David Nalbandian of Argentina at the Tennis Masters Cup in Shanghai, China Sunday, Nov. 12, 2006. Federer won 3-6, 6-1, 6-1. (AP Photo/Greg

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World number one, Switzerland's Roger Federer returns a ball from Argentina's David Nalbandian during their singles final in the Shanghai Tennis Masters Cup held at the Qi Zhong stadium in Shanghai, China