3) Pedro, Barcelona
He may have signed a new contract with the Catalan side not so long ago, but if United came calling the 27-year-old could be enticed to leave as he is currently behind Lionel Messi, Neymar, and Luis Suarez in the Nou Camp pecking order. Although not as globally renowned as Di Maria, he could do at least as well as the Argentinian did in the last campaign.