And he feels there's more to come from the midfielder.
He said, "I am very happy and I think he is working a lot for improving and he has energy, he has quality, he has things to improve. But he can do that.
"For us, we have to be demanding with him and he himself being demanding to improve the things that he can get better at in his qualities.
"When he's getting into the attacking third, into the box, to be calm to decide the last action with assist and scoring more.
"But he is giving us a lot of attacking moments and opening space for other players when they are arriving to the ball."