It did not look like it would be a hard day for Arsenal early on. Santi Cazorla struck in the sixth minute to put the home side on the front foot, and Villa were defending for much of the first half.
Yet the Gunners did not make their continuous pressure pay, and looked quite delicate at the back on numerous occasions. Eventually, Andreas Weimann, Villa's best player on the day, took advantage of a counterattack and powered a low drive past Wojciech Szczesny.
Arsenal got increasingly desperate and unlucky after the equalizer, but their probing eventually brought its just reward, as Cazorla produced a tidy finish to ensure three crucial points and a release of pressure.
Let's look at six things this game taught us.