MADRID (Reuters) - Real Madrid defender Antonio Ruediger said he is both impressed and surprised with the impact England midfielder Jude Bellingham has had on the team at the age of just 20 after he was signed from Borussia Dortmund last June.

The 31-year-old German defender heaped praise on Bellingham's leadership qualities, which has already made an impact inside Real's changing room.

"I was surprised because I didn't know him very well, but my goodness! He has a great personality that is already a presence in our squad. He is a very good player," Ruediger told a press conference ahead of Real's Champions League quarter-final first-leg clash against Manchester City on Tuesday.

"If you talk to (Bellingham) you get the feeling that he's already experienced everything and he's only 20 years old. I'm not surprised anymore.

"He's going to be a leader, he's very mature, very professional in everything he does. We must pray that he continues to be as healthy as he is. Off the pitch I'm not worried about anything, he has very good parents and a great environment."

Bellingham, signed for 103 million euros ($111.50 million), has made the transition from Dortmund to Real Madrid look ridiculously easy and is joint top-scorer in LaLiga with 16 goals -- tied with Girona's Artem Dovbyk and Osasuna's Ante Budimir.