7. Hatem Ben Arfa – Newcastle United

Hatem Ben Arfa should be one of Europe's great players – but for a number of reasons, the Frenchman has failed to hit the heights his talent would have allowed him to reach.

There's still time for the 26-year-old, who has been at Newcastle United since 2010, but when he embarks on one of his mazy runs or bends in a left-footed strike from 25-yards – you're left wondering why he's not playing his football elsewhere.

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