'I couldn’t believe it'

says William Gallas

Cristian Romero’s world-class potential

I think that Cristian Romero can definitely become one of the best centre-backs in the world. I think he can be one of the best players in the world. The only thing that he has to change is his attitude. When I say attitude, I mean he needs to stop getting himself in situations where he picks up stupid yellow and r…