Mardy Fish defeated No. 6 seed Tomas Berdych of the Czech Republic in the fourth round of Wimbledon today. Berdych was the 2010 Gentlemen's Singles runner-up.
Fish has never advanced past the third round of the Gentlemen's Singles draw, although he has been that far three times: 2003, 2006 and 2009.
Fish defeated Berdych in straight sets. He hit 42 winners, 23 of which were aces. Fish committed just 12 unforced errors, according to the official Wimbledon website.
His opponent in the quarterfinal will be No. 1 seed, and the ATP World Tour's top-ranked player, Rafael Nadal. Nadal is the defending champion and has already won the 2011 French Open. Nadal defeated No. 24 seed Juan Martin Del Potro of Argentina in the fourth round.
"He's as tough of an out as there is." Fish told Chris Evert in a television interview for ESPN2.
"He'll be real tough."
Fish has yet to defeat Nadal in five attempts. The last time the two played was at the 2008 U.S. Open, in the quarterfinals. Nadal won in four sets.
Fish is in the best physical shape of his life, though, and he is more mentally tough than in 2008. He is also No. 9 on the ATP World Tour in singles, making him the highest-ranked American man.
"I feel like I belong and I feel like I can beat anyone, especially on grass," Fish said.