9. Ander Herrera | Athletic Bilbao

Manchester United came close to triggering Ander Herrera's huge release clause in the summer.

The Red Devils might feel as if they've swerved a bullet because the Spaniard has only sporadically featured for Athletic Bilbao this term.

But if the 24-year-old harbours any hopes of playing at the 2014 World Cup finals, he must move on in January.

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