He says Juan Mata has been helping him adjust to life in the squad.
"I feel like I am annoying Juan Mata as I am always asking him about the training and the new experience," he said.
"Mata is helping me a lot, I know him very well. I can't describe the feeling when I went into the pitch wearing the shirt of the best team of the world.
"But it is very easy to play with all these players. The players who are in the squad are the best in the world and they're at the maximum level."
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