US Open Tennis - Day 9 (39 images)

Roger Federer hits a serve in his match against Igor Andreev on day nine at the U.S. Open Tennis Championships at the U.S. National Tennis Center in Flushing Meadows, New York on September 2, 2008. (UPI Photo/John Angelillo)

Switzerland's Roger Federer, second seed, reacts after losing a game to Igor Andreev of Russia in the first set of fourth-round action at U.S. Open tennis championship at the U.S. National Tennis Center on September 2, 2008 in Flushing Meadows, New York. (UPI Photo/Monika Graff)

Switzerland's Roger Federer, second seed, reacts after losing a game to Igor Andreev of Russia in the first set of fourth-round action at U.S. Open tennis championship at the U.S. National Tennis Center on September 2, 2008 in Flushing Meadows, New York. (UPI Photo/Monika Graff)

Igor Andreev of Russia serves to Switzerland's Roger Federer, second seed, in the first set of fourth-round action at U.S. Open tennis championship at the U.S. National Tennis Center on September 2, 2008 in Flushing Meadows, New York. (UPI Photo/Monika Graff)