Lucky to stay on the pitch when he brought down Agbonlahor in the box. He saved Benteke's subsequent penalty but could not stop the rebound and his decision-making was questionable throughout.
Appeared to make contact with the ball when he was adjudged to have brought down Agbonlahor in the box, picking up a yellow card and conceding a penalty which Benteke converted. The significance of that decision was amplified when he received his second booking for tripping Agbonlahor.
Generally a stable presence at the back but was exposed by Agbonlahor's pace in the build-up to Villa's first goal.
Switched to left-back to cover Gibbs' injury and played more conservatively as a result. Stretched by Agbonlahor's pace on occasion.
Badly cut his forehead in a clash with Weimann and was replaced by Jenkinson in the first half, though he was able to walk off the pitch.
Played a part in Arsenal's opening goal but, like a couple of his team-mates, struggled to cope as Villa ramped up the physicality in midfield and was booked for taking out his frustration on the referee.
Tidy enough in possession but Arsenal would surely have benefited so much more from a dedicated defensive midfield player in his position. The back four was left badly unprotected.
Released Oxlade-Chamberlain to set up the first goal and linked up well with Giroud but passed up two golden opportunities to score when the French striker put him through on goal.
Extremely bright early on and set up Arsenal's opening goal with a deft ball slid in to Giroud with the outside of his boot. Villa gradually tightened up on him, though, and he was brought off at half-time having come off worse in a challenge with Luna.
Involved in spells down the right-hand side but he never really had a good sight of goal himself and couldn't find a delivery of enough quality to set up the likes of Giroud.
Diverted home Oxlade-Chamberlain's cross to open the scoring and continued to provide a good reference point in attack, setting up Rosicky for two excellent chances after the break. He became more frustrated with Villa's physical play at the back as the game wore on, however.
Had no chance with the opening goal and superbly denied Rosicky and Cazorla to preserve Villa's lead in the second half.
Most of Arsenal's best play came down the left wing and he was outnumbered at times, especially when Vlaar stepped up, but the pressure eased as the game went on.
Played only 17 minutes before being substituted due to injury. Could not be blamed for Arsenal's early goal.
A bit haphazard at times but kept Walcott at bay throughout and even found some time to attack, bursting forward out of nowhere to slot home Villa's third. A promising debut.
Set the tone physically for Villa and occasionally strayed over the line, committing himself far too high up the field to allow Oxlade-Chamberlain to set up the first goal and seeing yellow for a foul on Wilshere. He grew stronger as the game wore on, though, giving Giroud an increasingly difficult time.
Held firm in a holding midfield role and almost caught Szczesny out with a long range effort in the first half. It was mostly a case of sitting deep and protecting the back four.
Showed the most attacking intent of the midfield three and combined with Luna on a couple of occasions before hitting the base of the post with a well-struck shot in the second half.
K. El Ahmadi
Excellent defensively, making a number of tackles in central midfield, though the accuracy of his passing wasn't always up to scratch.
Missed one penalty but converted the rebound and made no mistake with the second to get himself off the mark for the season. Agbonlahor was the biggest threat but he created space for the players behind him with his work up front.
Combined well with Agbonlahor and Benteke up front and picked out Luna as the left-back raced clear to seal the points.
Will not always give you a perfect final product but his running was tireless and caused Arsenal no end of problems. A brilliant dart through the middle drew the first Villa penalty and another run into the box the second, though Koscielny was unlucky to be penalised.
Came in at right-back after Gibbs injury but did not make a meaningful impact down the flank with not a great deal to do defensively.
Came close to making it 2-2 with a volley that he hit into the ground but Guzan pushed it onto the crossbar. Otherwise, it was clear why he hadn't started - he looked jaded after a midweek visit to Ecuador.