Rafael Nadal is one of the favorites to defend his title at Flushing Meadows in a couple of weeks' time. But, other than world No. 1 Novak Djokovic, Nadal can expect quite a few tough challengers vying for his crown.
The world No. 2 and French Open champion has already been shocked twice since his record-equaling feat at Roland Garros two weeks back—once by an acrobatic Frenchman and once by a never-heard-of-before Croatian.
While Nadal and Djokovic have stolen the limelight over the last year or so, they have overshadowed many good players in the draw who are capable of causing an upset or two.
Here's a list of the 10 most underrated players going into the U.S. Open.