Maria Sharapova of Russia returns the ball to Jarmila Groth of Australia during the first round of the U.S. Open on Tuesday in New York.
Three-time major champion Maria Sharapova lost to top-seeded Caroline Wozniacki 6-3, 6-4 Monday in the fourth round of the U.S. Open.
Sharapova, who won the 2006 title at Flushing Meadows, hurt herself with nine double-faults and a total of 36 unforced errors -- 26 more than 2009 U.S. Open runner-up Wozniacki.
It's the first victory for Wozniacki in three career meetings against Sharapova, who was seeded 14th this year in New York.
In the quarterfinals, Wozniacki will face 45th-ranked Dominika Cibulkova, who eliminated 2004 U.S. Open champion Svetlana Kuznetsova 7-5, 7-6 (4) Monday.