Nikolay Davydenko avenged last year's Tennis Masters Cup final defeat by Novak Djokovic to upset the world No. 3 in the semifinals of the Shanghai Masters on Saturday. The Russian sixth seed triumphed 4-6 6-4 7-6 (7-1) in a three-hour epic to earn a showdown with world No. 2 Rafael Nadal, who had an easier passage into the final when Feliciano Lopez became the tournament's ninth injury victim. Davydenko, beaten by Djokovic when the Chinese city held the season-ending finale ...

Defending champion Roger Federer and Argentine Juan Martin del Potro are locked together at one-set all in the men's singles final at the U.S. Open at Flushing Meadows. The Swiss top seed claimed the opening set 6-3 and achieved an early break in the opening game of the second set. However, Del Potro broke back when Federer was serving for the second set at 5-4 up, with the set eventually going to a tie-break. Federer had never lost a tie-break ...