10. Mesut Ozil | Arsenal
It's perhaps a little harsh to include Mesut Ozil in this list, but consider this: he has scored in just one Premier League match this season - out of nine - and contributed just one assist in his last seven domestic games.
For £42.4m, Arsenal fans would expect a little more, especially from a player of undoubted world-class talent.
The best is still to come from Ozil - but right now he's underperforming.