The Argentine had offers from both clubs when deciding to leave Real Madrid over the summer.
"I am very happy that I have joined Napoli. We have started well in the league in Italy and have got off to a good start in Europe too," said 'Pipita.'
"I know there was other interest from England and Italy, but I am very sure that I made the right choice by joining Napoli and have no regrets. It is a club where I can achieve everything I want."
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