Jo-Wilfried Tsonga of France and Janko Tipsarevic of Serbia won in straight sets on Wednesday to advance to the quarter-finals of the Open 13 tennis event.

The top-seeded Tsonga did not face any break points, winning 36 of his 41 service points to beat Nicolas Mahut 6-3 6-2.

Tsonga took a 3-0 lead in the first set and broke Mahut twice in the second.

He will next play Edouard Roger-Vasselin, who cruised past Flavio Cipolla of Italy 6-3 6-0.

Roger-Vasselin won the last eight games and broke Cipolla three times in each set.

The third-seeded Tipsarevic saved six break points to oust Belgian qualifier David Goffin 6-4 6-2.

Tipsarevic slammed an ace to take the first set and clinched victory 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 cracked 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 rallied to beat 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 and will next face Michael Llodra of France, who defeated Swiss qualifier Marco Chiudinelli 7-6 (2) 7-6 (3).

Llodra, a 2010 champion, had 12 aces in his victory.