KEY BISCAYNE, Fla. — After a succession of marathons at the Sony Ericsson Open, Roger Federer hurried into the quarterfinals.

KEY BISCAYNE, Fla. — After a succession of marathons at the Sony Ericsson Open, Roger Federer hurried into the quarterfinals.

Long matches pushed Federer's start into early this morning, and he wrapped up a victory at 1:29 a.m., needing just 52 minutes to beat qualifier Olivier Rochus 6-3, 6-1.

They took the court after Maria Sharapova earned a semifinal berth by winning a 31/2;-hour match that ended at 12:19 a.m. She beat No. 26-seeded Alexandra Dulgheru 3-6, 7-6 (6), 7-6 (5).

Sharapova's opponent Thursday will be No. 21 Andrea Petkovic, who upset No. 6 Jelena Jankovic 2-6, 6-2, 6-4. Two-time champion Kim Clijsters also went the distance, overcoming five match points to beat No. 19-seeded Ana Ivanovic, 7-6 (4), 3-6, 7-6 (5).

Mardy Fish, Rafael Nadal and Novak Djokovic also advanced to the quarterfinals