Arsenal defender Per Mertesacker has welcomed the arrival of Gabriel Paulista.
Mertesacker feels the former Villarreal defender will add to their title challenge.
"He is a talent and I think we will get him to the level he needs because he has that potential," said Mertesacker.
"From my point of view, it is very promising because we were short at the back, especially in the centre position. We suffered a lot and had to change so many positions.
"It was a needed position to get everyone going and keep him on his natural position is very important."
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