Gael Monfils of France defeated compatriot Paul-Henri Mathieu 7-6 (7-0) 6-4 to advance to the second round of the Mercedes Cup on Tuesday.

Monfils served 16 aces to set up a clash with sixth-seeded Florian Mayer, who defeated another German, Andreas Beck, 6-4 3-6 6-1.

Victor Hanescu rallied to beat Dmitry Tursunov of Russia 3-6 6-3 7-6 (9-7) in 2 hours, 25 minutes.

The Romanian will next face Brazilian Thomaz Bellucci, who defeated seventh-seeded Lukas Rosol of the Czech Republic 6-4 6-4. It was Rosol’s third consecutive loss.

Nikolay Davydenko of Russia came from behind to beat Spain’s Daniel Munoz-De La Nava 6-7 (8-6) 6-3 6-4 and set up a match with fourth-seeded Benoit Paire of France, who received a bye into the second round.

Leonardo Mayer of Argentina rallied to beat Spain’s Pablo Andujar 3-6 7-6 (7-5) 7-6 (7-5) in a match lasting 2 hours, 55 minutes.

Fifth-seeded Fabio Fognini of Italy bounced back from his first-round exit at Wimbledon by defeating Britain’s Alexander Ward 6-3 7-6 (7-5). Germany’s Nils Langer defeated fellow countryman Robin Kern 3-6 6-4 6-3.

Ernests Gulbis rallied past Marcel Granollers of Spain 4-6 6-1 6-1. The Latvian will face top-seeded Tommy Haas of Germany for a place in the quarter-finals.