keywords: federer henman quarterfinals walkover kiefer
text: Federer, Henman Advance at U.S. Open Top-seeded Roger Federer and No. 5 Tim Henman became the first men to reach the quarterfinals at the U.S. Open on Monday, Federer on a walkover over Romanian Andrei Pavel and Henman when Germany's Nicolas Kiefer retired with a wrist injury.