Roma defender Rick Karsdorp has enjoyed preseason training under new coach Jose Mourinho.

Karsdorp appreciates Mourinho's serious approach.

“In the world of football, everyone knows the Special One. But I only knew him from TV and interviews," the defender said.

“Now I can say that I like very much how he works, how he makes us train: the sessions are hard, but I like them so, they make me stronger.

“I like the way he talks. When I returned from the holidays, I wondered how he was, I was curious: I had only seen it on TV.

“He is a person who likes jokes at the right time. And this is very important for the group. But it only happens off the pitch. When we work, he is always very serious."