Federer, Djokovic go five sets at Open

Flushing Meadows, N.Y. -- Roger Federer and last year's runner-up, Novak Djokovic of Serbia both needed five sets Tuesday to reach the men's quarterfinals of the U.S. Open.

Federer took more than 3 1/2 hours to beat 23rd seed Igor Andreev of Russia.

Federer's 6-7 (5-7), 7-6 (7-5), 6-3, 3-6, 6-3 victory advanced him to the quarterfinals against Luxembourg's Gilles Muller who upset fifth-seeded Russian Nikolay Davydenko, 6-4, 4-6, 6-3, 7-6 (12-10).

The second-seeded Federer ran his winning streak to 31 at the U.S. Open, last losing in 2003. The former long-time world No. 1 Swiss, a 12-time major champion, overcame 60 unforced errors.

Last year's runner-up Novak Djokovic, seeded third, came from behind to beat 15th-seeded Spaniard Tommy Robredo 4-6, 6-2, 6-3, 5-7, 6-3. The 21-year-old Serb was bothered by an upset stomach and a sore ankle, but ultimately outlasted Robredo in 3 hours, 44 minutes.

The 6-foot-3 Djokovic was last year's U.S. Open runner-up to Federer and captured the Australian Open title back in January.

Copyright 2008 by United Press International.