"It is good for him that he is now back and has put a difficult period behind him," the Belgian told arsenal.com. "He can be really valuable for us I think. Mikel is injured now but Abou brings some physical presence in midfield as well. He is a good player for us so I am happy he is back.
"Mikel, as you have seen, has been important for us over the whole season. He is a leader on the pitch and outside the pitch and has a lot of experience. It is a big loss that he is not on the pitch anymore."