Both wing-backs worked together at Real Madrid before going their separate ways.
Ahead of the weekend's Milan derby, Theo stated: "Both Achraf and I played little in Madrid and the best thing for us was to leave, because if you are there and you don't play you are not happy and you don't have the opportunities you wanted.
"We did the best we could and now we are here in Milan.
"Achraf is an incredible player, he has a lot of talent, speed, quality, we more or less resemble each other. I know him personally and we have spent a lot of time together, he is a good guy and a great friend. What will I say to him in the derby? I will say nothing, on the field we are enemies, but outside of it we are good friends."