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.