Ollie Watkins scored twice as Aston Villa claimed an impressive victory at Arsenal and moved up to sixth in the Premier League.
The visitors took the lead midway through the first half when Bukayo Saka turned Matt Targett’s cross into his net.
The visitors had a goal ruled out inside the first minute when John McGinn thumped home Jack Grealish’s cross.
However, after a lengthy check by the video assistant referee, it was ruled out as Ross Barkley, who was in an offside position, was adjudged to have been in goalkeeper Leno’s way.
Watkins, who scored a hat-trick in a 7-2 win against champions Liverpool earlier this season, made it 2-0 with a header towards the end of the second half and scored his second soon after, slotting the ball under Bernd Leno after a quick break.
The Gunners had gone into this game looking to build on their impressive 1-0 win against Manchester United last time out, but despite dominating possession they created very little, with Alexandre Lacazette going closest when he headed over Kieran Tierney’s cross.
The defeat leaves an inconsistent Arsenal 11th in the table while the win maintained Villa’s 100% away record so far this season.