Last week Tsonga won his first title in two years, the ABN Amro World Tennis Tournament in Rotterdam.
Defending champion Nick Kyrgios was eliminated in the semifinals of the Open 13 Provence by second seed Jo-Wilfried Tsonga 7-6 (5), 2-6, 6-4.
Victory yesterday in the final would mean a career first for Tsonga of back-to-back ATP Tour triumphs and marks a real return to form for last year's US Open quarter-finalist.
The former Australian Open runner-up broke once in each set and added a third Marseille trophy to his collection after victories in 2009 and 2013.
And he carried that momentum into the final, seeing off a player in Pouille who beat Rafael Nadal en route to the US Open quarter-finals past year.
Tsonga came from a break down to win the first set in a tie-break, but Kyrgios looked to have the momentum after a dominant second.
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His success sets up an all-French final against Lucas Pouille, who overcame compatriot Richard Gasquet 7-5 6-3.
"I'm on top form right now so let's see", Tsonga said.
Tsonga and Pouille have met only once before, when Tsonga came out victor in their FedEx ATP Head2Head encounter at the 2016 Monte-Carlo Masters on clay.
Pouille thumped Gasquet in straight sets and had even been leading 5-0 in the second set. I will have to make choices', said Tsonga after the title won in Marseille.
"I was never in too much danger".