“But he has the ability. He is a player who has the personality to want to improve, he always wants to do better.

“He’s never happy with himself, he’s disappointed if he doesn’t score, or his passes aren’t good enough.

“When I joined Feyenoord, he hadn’t played a lot because everyone said he was too young. I put him in the first team and let him play most of the games, I trusted him and saw a lot of ability in him.

“Now he’s proving himself in Holland and is one of the best midfield players in the country. He’s certainly got the ability to make that step to the Premier League.”