Henrikh Mkhitaryan was no doubt hoping to take all three points on his return to his former club, a strained relationship with Jose Mourinho providing him with extra incentive as the Gunners travelled to Old Trafford.
Despite a creditable 2-2 draw, there was a sense of frustration with how Arsenal conceded both equalisers, and the chances missed.
Pierre-Emerick Aubameyang a glorious chance to put Unai Emery’s men 3-2 up, as did Mkhitaryan himself but he poked the ball high over the bar from close range.
The Armenian international’s regret at not taking all three points was palpable when he spoke to the official website after the game.
“There is a lot of frustration because we should have won today,” he said. “I think we deserved to win but we drew. We were trying to score the third goal but unfortunately we couldn’t.
“Even if you have tired legs, the most important thing is to be fresh in the brain, in the mind. If you force yourself, if you push yourself to get to the end, then you will do that.
“You don’t have to listen to your legs, even if they are heavy or it’s hard to play. You have to do the maximum.
“We want to be in the top four, so it’s very important to win every game.”
Arsenal have injury worries on top of that too, with Rob Holding believed to have picked up a serious knee problem, while Aaron Ramsey suffered an ankle injury late in the first half.
Emery’s side slipped down a place in the table to 5th, but are now level on points with Chelsea who lost 2-1 to Wolves last night.