He said: "Thomas has everything I like in a footballer. He doesn't talk a lot but he is convincing on the pitch.
"He is a competitor, a fighter. It's true, you must get over that first reluctance to say, 'Is he tall enough to play in a central defensive position?'.
"But he compensates with a good reading of the game and what people ignore is that he has a big leap, a fantastic leap - he's very good in the air."