The Brazilian striker moved to the Emirates this summer in a deal reportedly worth £45 million.
He has hit the ground running at Arsenal and has already scored two goals for the Gunners this season.
“Obviously we had to change his role and what he had to do in this football club and now he’s one of the leaders. He’s a natural leader, but he’s also somebody that is prepared and I think is in a stage of his career where he’s able to do what we are demanding him to do.”
“That’s what he needed,” Arteta added of his change in environment. “Obviously he’s played a lot of games in this league in the last few years but not that many as a starter, especially in the last two years.
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