4. Mamadou Sakho | Liverpool

Liverpool boss Brendan Rodgers spent £17m on France defender Mamadou Sakho in the summer, but the 23-year-old has been left out of recent matches due to his below-par performances.

He showed at Paris Saint-Germain that he's a defender of real quality - but now he must prove it.

Topics:
#Football
#Premier League
#Stevan Jovetic
#Wilfried Zaha