Jo-Wilfried Tsonga of France and Janko Tipsarevic of Serbia won in straight sets Wednesday to advance to the quarterfinals of the Open 13.
The top-seeded Frenchman did not face a break point, winning 36 of his 41 service points.
Tsonga took a 3-0 lead in the first set and broke Mahut twice in the second. He will play Edouard Roger-Vasselin, who defeated Flavio Cipolla of Italy 6-3, 6-0.
The third-seeded Tipsarevic saved six break points to oust Belgian qualifier David Goffin 6-4, 6-2.
Tipsarevic had an ace to win the first set and clinched the match with a forehand pass down the line. He will meet Ivan Ljubicic, who beat Karol Beck of Slovakia 6-4, 7-6 (1).
The seventh-seeded Croat had 15 aces. Beck was broken at 5-4 to lose the opening set before dropping the second on a tiebreaker.
In the first round, Alexandr Dolgopolov defeated Lukas Rosol of the Czech Republic 2-6, 7-6 (1), 6-3.The sixth-seeded Ukrainian broke for a 3-1 lead in the final set.
He'll face Michael Llodra of France, who edged Swiss qualifier Marco Chiudinelli 7-6 (2), 7-6 (3).
Llodra, a 2010 champion, had 12 aces.
