Former Manchester United coach Rene Meulensteen has no doubts Cristiano Ronaldo will be a success with Juventus.
Meulensteen expects Ronaldo to be at his very best for the next two years.
He told Gazzetta dello Sport: "I have not talked to him for a while, but I know he's still 100%. Cristiano is a leader, he has thrown Portugal on his shoulders, as a nation and as a team.
"He needs to play as a centre-forward. It is important that you do an intelligent job on the defensive side, you cannot always push like you did when you were 23 years old. He also changed, there was a moment when he always wanted to have the ball at his feet and I told him that with (Paul) Scholes on the side he could run and give him the ball later.
"I do not think he'll have physical problems until 2020, he will maintain the current level, then we'll see."