Manchester United manager, Ruben Amorim, has said set pieces gave Arsenal the advantage in the Premier League clash on Wednesday night.
Jurrien Timber and William Saliba both scored for the Gunners from corner-kicks, as they claimed a 2-0 win at the Emirates.
The result is the first defeat for United under Amorim.
And the 39-year-old has said his team should have been more aggressive against Arsenal.
“The set pieces changed the game,” Amorim told Match of the Day.
“We could’ve been more aggressive towards the Arsenal box. Until the set pieces the game didn’t have too many opportunities for both sides, the set pieces killed the game.
“We were committed and we lost to the set pieces. We tried to play but they are a very organised team and it’s hard to score. I felt the players were in control of the game, the set pieces changed the game in the second half.”