Speaking at his pre-match press conference, the Chelsea manager said: "I think it's a process. The temptation is to analyse and compare a player from one season to another when it's not fair. It's a different environment, different moment, how the situation is now. He arrived when we were already playing games in the Premier League, with no pre-season. It's an emotional situation that happened with him. Then he got injured with his national team and has had no time to rest or recover. Now we have a couple of months for players to rest and play and to be focussed on Chelsea. It's unfair to compare players from one season to another."