Roger Federer advanced to the quarter-finals of the Sony Ericsson Open after beating qualifier Olivier Rochus 6-3 6-1 in a match that ended at 1:29 am this morning.
Taking the court following a succession of marathon matches, Federer needed just 52 minutes to beat his Belgian opponent as a couple of thousand fans remained until the finish.
Federer's opponent tomorrow will be 25th seed Gilles Simon of France, who beat Serbian Janko Tipsarevic 4-6 7-6 6-2.
Federer and Rochus took to the court after Maria Sharapova earned a semi-final berth by winning a three-and-a-half-hour match that ended at 12:19am. She beat 26th seed Alexandra Dulgheru of Romania 3-6 7-6 7-6.
Sharapova's opponent will be Andrea Petkovic of Germany, seeded 21, who notched her second upset in two days after she beat sixth-seeded Jelena Jankovic 2-6 6-2 6-4. Petkovic eliminated World No1 Caroline Wozniacki in the fourth round.
Two-time champion Kim Clijsters also went the distance, overcoming five match points to beat Ana Ivanovic of Serbia 7-6 3-6 7-6.
Clijsters was serving at 1-5, love-40 down when her comeback began.
Ivanovic took the loss badly.
"You should see my racket," the 2008 French Open champion said, managing a smile. "I kind of broke my racket, and then kind of cried a little bit, and then I was OK."
Male second seed Novak Djokovic extended his winning streak to 23 consecutive matches by beating fellow Serbian Viktor Troicki 6-3 6-2 for the ninth successive time.
Djokovic won two Davis Cup matches in December and is 21-0 this year, the best record to begin a year since Ivan Lendl started 25-0 in 1986.
Also advancing to the quarter-finals was top-ranked Rafael Nadal, who committed only five unforced errors to beat No21 seed Alexandr Dolgopolov of the Ukraine 6-1 6-2.
Mardy Fish, the last American in the tournament, limped into the quarter-finals, and a clash with sixth-seed David Ferrer after a gruelling 7-5 7-6 win over Juan Martin del Potro.
Fish, 29, will overtake Andy Roddick and become the top-ranked American man for the first time if he defeats Ferrer.
"Being the No1 American would be something that would be pretty cool to tell my kids about," said Fish.
American John Isner, seeded 30th, lost 6-3 7-6 to South Africa's Kevin Anderson.