Federer, Nadal reach quarters

MADRID (AP) - Roger Federer and Rafael Nadal reached the quarterfinals of the Madrid Masters on Thursday with straight set victories.

The top-ranked Federer beat Swiss countryman Stanislas Wawrinka 6-3, 6-1 and second-ranked Nadal saw off big-serving John Isner of the United States 7-5, 6-4.

Defending champion Federer never looked troubled against Wawrinka, and appears to be shaking off the slip in form that had him lose in the semifinals in Estoril and the second round in Rome recently. In the quarterfinals he'll play Ernests Gulbis of Latvia, who beat him in Rome.

Isner held his own against Nadal before losing his serve in the 11th game of the first set, during which he received treatment to his arm.

Mutua Madrilena Masters/Open Results

Thursday At Caja Magica

Madrid, Spain

Surface: Clay-Outdoor

Singles: Men Third Round

Jurgen Melzer, Austria, def. Fernando Verdasco (6), Spain, 7-5, 6-3.

Nicolas Almagro, Spain, def. Juan Monaco, Argentina, 6-4, 6-1.

Rafael Nadal (2), Spain, def. John Isner (13), United States, 7-5, 6-4.

Gael Monfils (12), France, def. Guillermo Garcia-Lopez, Spain, 7-6 (5), 6-4.

Andy Murray (3), Britain, def. Victor Hanescu, Romania, 6-2, 6-1.

David Ferrer (9), Spain, def. Marin Cilic (8), Croatia, 6-3, 6-2.

Roger Federer (1), Switzerland, def. Stanislas Wawrinka (15), Switzerland, 6-3, 6-1.

Ernests Gulbis, Latvia, def. Feliciano Lopez, Spain, 6-2, 7-6 (0).

Women Third Round

Sam Stosur (8), Australia, def. Patty Schnyder, Switzerland 7-6 (3), 6-2.

Li Na (13), China, def. Alona Bondarenko, Ukraine, 6-3, 6-4.

Shahar Peer, Israel, def. Arantxa Parra Santonja, Spain, 7-5, 6-2.

Aravane Rezai, France, def. Andrea Petkovic, Germany, 6-4, 7-6 (8).

Jelena Jankovic (7), Serbia, def. Anabel Medina Garrigues, Spain, 6-2, 6-0.