Men’s top seed Novak Djokovic advanced to the quarterfinals of the 2011 U.S. Open with a straight sets victory over Alexandr Dolgopolov, but it wasn’t as easy as the 7-6, 6-4, 6-2 scoreline reads. The first set tiebreak took 30 points as Djokovic won 16-14 to take the opening set. It was the first real scare for the Serbian so far in Flushing. Djokovic will take on fellow Serb Janko Tipsarevic, who took out Spaniard Juan Carlos Ferrero on scores of 7-5, 6-7, 7-5, 6-2, in the quarterfinals.
Serena Williams continued her winning ways by knocking off 16th seeded Ana Ivanovic. Williams won on scores of 6-3, 6-4, and will next take on Anastasia Pavlyuchenkova, the 17th seed who knocked off No. 7 seed Francesca Schiavone on Sunday.
There are now three American men left in the tournament, as Mardy Fish lost his fourth round match on Sunday to Jo-Wilfred Tsonga. Fish had a two sets to one lead before dropping the final two frames. On Monday, the remaining three American men are all in action in fourth round matches. Donald Young takes on 4th-seeded Englishman Andy Murray, John Isner faces GIlles Simon and Andy Roddck has a tall order ahead of him when he faces the No. 5 seed, David Ferrer.