"If you are a big signing, everyone expects you on the pitch immediately and you have to perform immediately, but it is difficult. I was happy with him from the first day about his involvement, and attitude and since then he has become more and more a Liverpool player.
"He is really fit and looks in really good shape. He has played in different positions, the biggest potential he has is to being involved in goalscoring situations more, he has it in himself, but he was not asked too much of this in the past (at Arsenal).
"Here, if he is on the pitch he needs to be involved in those situations. It is good, but I see a lot of space for improvement. He is a good lad, I'm really happy to have him around."