David Silva, by a long streak.
Others to mention:
Yaya: has been influential in games but drifts in and out
Hart: needs recognition for the clean sheets.
Demechelis: has had a good month, he makes an enormous fook up every game , but lately it's not cost us. Now, we have to consider that he's a right DM playing at left DM and a lot of the time he's beaten on the left. I think they have been doing work with Kolarov and Clichy to not leave him exposed.
Dzeko: Good month for the Bosnian diamond, some outstanding work picking the ball up, distributing it and even covering for the full backs. Picked it up where Negredo and Aguero have faded away due to form/ injury.
Kick up the arse needed for:
Navas: Southampton game was terrible 1st half, took him a couple of runs to get into it in the second half before he played the killer ball for Jovetic.
Seems to endlessly wander around when he's not getting the ball. Hard to justify his place in the team when opposition's left back is just there to defend.
Nasri: He's set the standard that we know he's capable of achieving earlier in the season and he's not shining as much. Maybe it's just Dave's turn to take the limelight.