Solskjaer has also likened the midfielder to his former teammate Paul Scholes.
He said: “He reminds me of Scholesy as a player but definitely a different type of personality off the pitch.
“Against Club Brugge, when he's on the bench, he walks around, he speaks to the players who start, he helps them, he gives them points.
“And the ten minutes he played you could see that there's a difference in our team.
“He's another conductor and leader and winner. He wants to win. He doesn't take 99 per cent as good enough and he's impressed me.
“That's something you see when you watch him but you don't know about until you have him in your group. He's been top class."