Bafetimbi Gomis says Dimitri Payet will need time to recapture his best form at Marseille after his self-imposed exile at West Ham.
Payet moved back to the Stade Velodrome for £25 million in January after 18 months at West Ham where he delighted for the most part.
However, he left in acrimonious circumstances after refusing to train with the Premier League club in his attempts to force a deal through.
Gomis believes his self-imposed lack of match practice in the final days at West Ham has left Payet short of sharpness, but the striker has backed his new colleague to make an impression.
"He's coming back, he did not play for a month," Gomis told L'Equipe.
"With all that was said during his transfer, he needs time to digest. But we will put him back in confidence.
"I think he came back and did some good things, [against Metz] and against Lyon.
"He will be back. You know all the talent he has in his feet."