5) Petr Cech looks a superb signing
Marking his Arsenal debut with a win and a clean sheet against his old club, Petr Cech looked rock solid at the back for the Gunners in this morale-boosting victory. The Czech Republic international made some fine saves to keep Chelsea out, and gave Arsenal a rare win over their rivals, who usually have no trouble scoring against them and their previously fragile defence. Laurent Koscielny and Per Mertesacker may have their critics, but they will feel a lot more confident and assured at the back with the presence of such a fine shot-stopper and commanding leader behind them.