Andy Roddick of the United States reacts after winning a point against Nikolay Davydenko of Russia during thier match of the Tennis Masters Cup Shanghai at Qi Zhong Stadium yesterday in Shanghai, China. Roddick beat Davydenko 6-3, 4-6, 6-2. --Xinhua

American former world No.1 Andy Roddick started his Masters Cup campaign with a roller coaster 6-3, 4-6, 6-2 win over Russian world number four Nikolay Davydenko in Shanghai yesterday.

Roddick should have made it shorter when he was leading one set and one break up in the second set, but the bald Russian stretched his opponent all the way in a shade of two hours.

Another two contenders of the group, world number one Roger Federer of Switzerland and seventh seed Fernando Gonzalez from Chile, will play Monday's later match in the 4.45 million U.S. dollars event at Shanghai's Qi Zhong Tennis Stadium.