Arsenal probably don't deserve to be 2-0 behind, or even behind at all, but there's a very real danger that this game will turn into something of a mauling unless they can rebound from this setback, and soon. Their play has probably warranted a goal - Edwin van der Sar has kept them at bay with fine saves from Robin van Persie, Samir Nasri, and most recently Laurent Koscielny - and Manchester United have taken two out of their three real chances, but the Gunners are down by two at Old Trafford and opening themselves up to the counterattack, which is even more dangerous now that Antonio Valencia is on the pitch.
United are defending like lions to boot, with Chris Smalling and Nemanja Vidic obliterating Arsenal's best efforts to achieve penetration inside the Arsenal box. Smalling just produced a miraculous overhead kick clearance to prevent Jack Wilshere from going one on one against van der Sar, and he and Vidic are mopping up the now-dozens of crosses that are being swung into their box. Can Arsenal get one back and make things interesting? Marouane Chamakh is warming up, but he's unlikely to be the answer to his side's attacking woes.