Rafael Nadal, Andy Roddick, Andy Murray, John Isner Advance To U.S. Open 2011 Quarters

Rafael Nadal, Andy Murray and Americans Andy Roddick and John Isner have advanced to the quarter-finals of the 2011 U.S. Open.

Nadal faced a stiff challenge from Luxembourg’s Gilles Muller, who pushed the second-seeded Nadal to a tiebreaker in the 65-minute first set before the Spaniard breezed through the final two sets in a total of 63 minutes. Nadal won on 73% of his first serves, while Muller committed 43 unforced errors. No. 4-seed Murray needed just under two hours to dispose of American Donald Young in straight sets 6-2, 6-3, 6-3.

As long as we avoid another day of rain, expect to see a lot of great tennis Thursday. Especially with a trip to the quarterfinals and semifinals on the line for everyone, depending on where they left off.

Here are the key matches for Wednesday: