Centre-back: Gerard Pique
Manchester United fans must look at Gerard Pique these days and wonder why on earth he was allowed to leave the club in 2008.
The main reason was because he had Rio Ferdinand and Nemanja Vidic ahead of him in the pecking order at Old Trafford - and, more importantly, his boyhood club Barcelona wanted him back.
Pique has won 16 trophies at the Nou Camp and has never looked back.
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