The hosts doubled their advantage before the break with Pierre Emerick Aubameyang driving home after his penalty was saved by Villa's former Arsenal goalkeeper Martinez. Referee Craig Pawson gave the penalty following VAR review in added time after Villa defender Matt Target went through the back of Alexander's leg.
Therefore Arsenal turned on the style with a confident 3-1 home win over Aston Villa in the Premier League on Friday to extend their unbeaten run to six games in the competition.
The win moves the North London side up to ninth spot, level on 14 points with sixth placed Manchester United and there were real signs that manager Mikel Arteta us finally putting together a side with prospects.
Emile Smith Rowe delivered another excellent performance on the left of midfield, capping his display with the third goal, but there was a good shape and confidence to the entire team
A Smith Rowe corner led to the opening goal with Thomas Party's attempted headed glancing off his shoulder and going in the far corner to give the Gunners' a 23rd minute lead.
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