The Ivorian now appears to be turning a corner and his goal in Sunday's 3-1 win at Leicester City was his fourth in his last seven Premier League starts.
“I think every player who comes to the Premier League needs a little bit of time to adapt," said Xhaka.
“I think he is now this guy and the player what we wish, what the people wish, and he is doing very good game by game, training by training.
“I am so happy for him. He helped us today with a goal."