Five-time U.S. Open champion Roger Federer beat 13th-seeded Jurgen Melzer of Austria 6-3, 7-6 (4), 6-3 Monday night to reach the quarterfinals at a 26th Grand Slam tournament in a row.
That sets up an intriguing matchup: No. 2 Federer against No. 5 Robin Soderling of Sweden. It was Soderling who ended Federer's streak of 23 consecutive Grand Slam semifinals by upsetting him in this year's French Open quarterfinals.
Meanwhile, Maria Sharapova lost to No. 1-seeded Caroline Wozniacki of Denmark in the fourth round 6-3, 6-4.
It's the first victory for Wozniacki in three career meetings against Sharapova, but they hadn't met since 2008. In that time, the 20-year-old Wozniacki has grown as a player and built a huge supply of confidence, thanks to her Grand Slam final debut in New York and, most recently, her 18-1 record since Wimbledon.
Wozniacki carries a 12-match winning streak into her quarterfinal against 45th-ranked Dominika Cibulkova, who eliminated 2004 U.S. Open champion Svetlana Kuznetsova 7-5, 7-6 (4).
The other quarterfinal on that side of the draw will be No. 31 Kaia Kanepi of Estonia against No. 7 Vera Zvonareva, who overwhelmed 38th-ranked Andrea Petkovic of Germany 6-1, 6-2 Monday night. Zvonareva, the runner-up at Wimbledon in July, reached the U.S. Open quarterfinals for the first time.
Earlier, Kanepi did the same by coming back to defeat 2009 U.S. Open semifinalist Yanina Wickmayer of Belgium 0-6, 7-6 (2), 6-1.
Third-seeded Novak Djokovic might have said the same about his own play Monday, when he reached the men's quarterfinals at the U.S. Open for the fourth consecutive year by outclassing No. 19 Mardy Fish of Tampa 6-3, 6-4, 6-1.