Speaking ahead of Wednesday's game, the Spaniard said: "He is a good guy, he is humble, he is a very good professional player, he is really happy with his team-mates. He has been demanding of himself. I think he is playing free. The first thing is to try and connect with him as a person, then after that to connect with him as a player.
"His process here is getting better as well. He is playing in two different positions, he started as a left winger, now he is playing more as a striker. We want to find how he can exploit his qualities as best as possible with us. This is the process we have, still work to do, still process to do, but the most important is his feeling.
"We are seeing him smiling. It is the best news we can have. I am seeing him happy, I am seeing him committed with everything we are doing."