Easy one. Messi, but you have to admit Alves puts in 200% he really deserves some credit.
Eto too for scoring all those goals, and Yaya for holding back attacks.
Malaga - Barcelona: Xavi = He scored to give us back the lead (which was very important in a match like that one)
Barca - Valladolid: Eto = He was a wizard making plays and a constant thorn against Valladolid.
Recreativo - Barca: Messi = being MOM is enough
Barca - Getafe: Toure = didn't play
Sporting - Barca: Messi = did you see the match?
Sevilla - Barcelona: Messi = He exploded in the end to finish off Sevilla in style!