Barcelona have agreed to pay around £15million for the Cameroon international midfielder.
The 24-year-old has signed a five-year contract with the Spanish giants.
“Everyone at Arsenal would like to thank Alex for his contribution to the club and wish him the best of luck for the future,” read a statement on Arsenal’s website.
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Being an amiable guy is good for you and Jurgen Klopp is living proof.
Summer 2016 is set to be a very exciting time for football fans, as this is when the long awaited Euro 2016 tournament kicks off.