Clijsters tops Venus at Open; Nadal, Serena win

Rafael Nadal encountered as much trouble from his own body as his opponent in a third-round victory at the U.S. Open. The third-seeded Nadal, who missed Wimbledon with sore knees, needed a 10-minute injury break for a trainer to work on his abdominals early in the third set of his 7-5, 6-4, 6-4 victory over No. 32 Nicolas Almagro on Sunday. The stomach injury first cropped up for Nadal last month at a tournament in Cincinnati.