The most recent departure on this list, and one who's carried on his form since appearing at new club Arsenal, Alexis Sanchez is a player who can rightly feel aggrieved at being shown the door. The talented Chilean notched 39 goals in three seasons at the Nou Camp, not bad for a deep-lying midfielder sharing chances with the prolific Lionel Messi. He went on to prove himself one of the smartest signings of the 2014/15 Premier League season, propelling a much-improved Arsenal side to third place and an FA Cup triumph.
