There's a bunch of things that can be written about today's game, but the most important one is that Arsenal left the pitch with three points, and live to fight another day. The nature of the League has changed a little bit over the past few years: the teams at the top win more often than they used to, so draws are less and less useful.
It was a typical Arsenal effort in many ways: lots of chances but not so much scoring. But if there's anything positive to take from today, it looks to me like the team has a little better handle on how to quit dancing in possession and get a shot off. We can hope it's a good omen that the winning goal was by Sasha Hleb.