The fortunes of American tennis rest with Mardy Fish, the sole American in the Wimbledon quarterfinals.

In a mild upset, Fish, the 10th seed, beat the 2010 Wimbledon runnerup and sixth seed, Tomas Berdych of the Czech Republic, 7-6 (7-5), 6-4, 6-4.

Fish, 29, will play Rafael Nadal, who won an injury-plagued match against Juan Martin Del Potro. Fish has never played in a Grand Slam semifinal; he was a quarterfinalist at the 2007 Australian Open and 2008 U.S. Open. Against Berdych, who had not lost a set in his first three matches, Fish served 23 aces and saved both break points.

In an interview over the weekend, Fish said he wasn’t thrilled to be the only American man left — and that was before the Williams sisters’ exit Monday.

“It doesn't feel great,” Fish said Sunday. “I want the guys here. So that's a bit of a bummer, I guess.”