Maitland-Niles gave Arsenal a mountain to climb within the second half after Jonathan Moss issued the teenager his marching orders for a flying problem on Neil Taylor.
It was Maitland-Niles’ second bookable offence and Emery insisted his participant didn’t make contact with Villa’s Taylor.
‘I was thinking we can manage,’ Emery stated concerning the purple card. ‘He didn’t contact the participant.
‘He touched the ball. We had to accept the referee’s choice.’
He added: ‘I was thinking it was not a red card.’
Arsenal had been dropping 1-Zero after they went down to 10 males, however Nicolas Pepe equalised from the spot for the Gunners within the 59th minute.
Unfortunately, Villa hit again instantly by means of Wesley, simply 89 seconds after Pepe’s penalty.
Arsenal had been heading for an additional disappointing end result earlier than Calum Chambers sparked a exceptional comeback within the 81st minute.
Pierre-Emerick Aubameyang then scored a shocking free-kick to offer ten-men Arsenal all three factors and hearth the Gunners into fourth spot.