Jo-Wilfried Tsonga is closing in on a third semi-final appearance at the Open Sud de France after beating Nicolas Mahut in Montpellier.
The third seed won the all-French affair 7-6 6-7 7-6 and will play Andrey Rublev in the quarter-finals.
Tsonga reached the semi-finals in Montpellier in 2010 and 2017, the only other times he has played in the tournament. Tsonga is 4/6 to beat Rublev.
Lucas Pouille easily beat Carlos Taberner 6-1 6-2 and Richard Gasquet defeated Pierre-Hugues Herbert 7-6 5-7 6-3.
Meanwhile, Stan Wawrinka was forced to dig deep before seeing off Martin Klizan 4-6 6-2 6-3 at the Sofia Open.
"I expected a tough match; he's already played a few matches here," Wawrinka said of Klizan, who qualified for the tournament. "I just tried to focus on my game, find the right shots and be aggressive."
Wawrinka will face Viktor Troicki, who beat Denis Istomin 7-6 1-6 7-6, in the next round, and said of his opponent: "I know Viktor is playing really well here and I'm expecting a tough match; I'm going to try and rest now to be ready for the game."
Wawrinka is 1/2 to beat Troicki.
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