Montpellier - Frenchman Nicolas Mahut beat sixth-seeded Florian Mayer 7-6 (7/3), 6-3 on Thursday to reach the quarter-finals of the Open Sud de France.
Mahut jumped to a 4-1 lead in the tie-breaker and took the first set when Mayer double-faulted. He then broke the German twice in the final set to clinch victory.
He will next play the winner between top-seeded Tomas Berdych of the Czech Republic and French qualifier Florent Serra.
Results on Thursday from the Open Sud de France, an ATP event on indoor hard-courts at the Park and Suites Arena (seedings in parentheses):
Nicolas Mahut, France, def. Florian Mayer (6), Germany, 7-6 (3), 6-3.
Tomas Berdych (1), Czech Republic, def. Florent Serra, France, 6-0, 6-2.
Gael Monfils (3), France, def. Michael Russell, United States, 6-3, 6-3.