Monfils through to quarters

Gael Monfils: Continued his comeback with a win over Nicolas Mahut

Gael Monfils' comeback from a knee injury continued on Thursday with a 7-6 7-5 victory over compatriot Nicolas Mahut in the Moselle Open.

The seventh seed spent several months on the sidelines due to the knock, but he is now successfully through to the quarter-final finals of the tournament.

It was Monfils' second match since losing to Brian Baker of the United States at the Open de Nice in May. The 2009 Metz champion hit 12 aces to secure a match against second-seeded Philipp Kohlschreiber.

"The fatigue builds up, I have lots of little niggles," Monfils said. "I still feel a bit heavy, so I push and grimace a bit. But day after day, I'm getting better."

Kohlschreiber, a runner-up three years ago, defeated Benoit Paire of France 6-2 1-6 6-1.

Retired

Third-seeded Marcel Granollers of Spain was forced to retire with an abdominal injury when trailing Ivo Karlovic 6-2 2-2.

The Croatian will face Nikolay Davydenko in the quarters after the eighth-seeded Russian defeated Gilles Muller of Luxembourg 7-5 6-4.

Fifth-seeded Andreas Seppi of Italy is also through after cruising to a 6-2 6-1 victory over Frenchman Vincent Millot in just over an hour.

American Jesse Levine faces a quarter-final against top-seeded Jo-Wilfried Tsonga after beating Michael Berrer of Germany 6-3 3-6 6-0.