5) Mustafi is returning to England
Yeah, you read that right. Arsenal’s new signing is not new to English Premier League. He was an academy player of Everton. However then Everton manager David Moyes didn’t give Mustafi a chance to show his qualities and the German was shown the door. He joined Sampdoria where his fine performances earned him a move to Valencia. He formed a great understanding with Nicolas Otamendi during his time at the Mestalla.