The Frenchman has finally gathered some momentum after an injury-ravaged time with the club, and it hasn't gone unnoticed by his coach.
Koeman said, "Ousmane has been here for many years and has had a lot of bad luck with injuries. It is difficult for him to be at his best level. I hope he continues physically well, he is training well, happy.
"I like the player because he offers something different to [Antoine] Griezmann, [Francisco] Trincao or Leo [Messi].
"He's excellent in one-on-one situation and can play with both feet. Hopefully he continues at this level."