AS Monaco midfielder Cesc Fabregas says former Chelsea teammate Andreas Christensen needs to "toughen up".

Christensen is expected to leave Chelsea for Cesc's former club Barcelona this summer.

Cesc told Sport, "He started training with us in Chelsea already when he was very young.

"It was already seen then that he had a great talent and read the game very well.

"But I've always said he has to get a little tougher, do you understand? He is a very nice guy, but sometimes you need to be a little ugly.

"He reminds me a lot of Eric Garcia."