Tsonga, Simon in all-French Metz ATP final

After a three-month injury lay-off Jo-Wilfried Tsonga has made the final of the ATP event at Metz in France, where he is aiming for a third straight title.

Two-time defending champion Jo-Wilfried Tsonga has reached the Metz ATP final in France. (AAP)

Two-time defending champion Jo-Wilfried Tsonga, who is playing his first tournament for almost three months, reached the Metz ATP final on Saturday.

Top-seeded Tsonga, the world number eight, came back from a set down to defeat German eighth seed Florian Mayer, 4-6 6-2 6-3.

In Sunday's final, he will face second-seeded compatriot Gilles Simon who put out fellow Frenchman Nicolas Mahut, 6-3 7-6 (7-2).

Tsonga had been sidelined from the tour because of a knee injury picked up at Wimbledon.

He had also needed three sets to beat Germany's Tobias Kamke in Friday's quarter-finals.