1. Laurent Koscielny
Arsenal probably have the best central defensive pairing in the Premier League and this is down to the two players complimenting one another perfectly.
If Mertesacker is the vocal leader, organiser and incredible reader of the game, Laurent Koscielny is the all-action firefighter, ready to react to any situation at the drop of a hat. The France international has further enhanced his reputation this season and has been nearly faultless for much of the campaign.
Whether it be winning in headers or making well-timed tackles, Koscielny has been doing it with great quality for some time. He is especially effective in one-on-one situations and if reports he is in line for a new contract are accurate, there is no more deserving player at Arsenal.