Erik Lamela (Tottenham £30m)
Lamela moved to White Hart Lane nearly two years ago, but his impact can be measured in one brief moment, when he scored a rabona goal in the Europa League. Apart from that, the former Roma man has frustrated Tottenham fans, perhaps like no other player. One league goal in 33 appearances suggests that a transfer away, and a heavy loss for Spurs, may soon be on the cards.