Before they had even stepped onto the pitch to play Leicester, Arsenal had enjoyed a pretty decent weekend.
With Manchester United and Chelsea drawing 0-0, Everton losing to Southampton and Wolves dropping points against Newcastle, Mikel Arteta’s side had a chance to capitalise.
A win would put them on 12 points - into the top-four a point behind both Everton and Liverpool at the top of the table.
However, they lost 1-0 to Brendan Rodgers’ side leaving them in tenth following their third defeat of the season.
It was a frustrating night for the Gunners, who started brightly and saw an early Alexandre Lacazette goal ruled out for offside.
The French striker later missed a golden opportunity to put his side ahead.
And just when the match looked to be heading for a 0-0 draw, Leicester substitute Jamie Vardy got on the end of Cengiz Under’s cross to give his side the three points.
While Leicester substitute Vardy was the hero, many Arsenal fans believe one of their subs was the villain.
In the 49th-minute, David Luiz had to be taken off due to an injury. On came the much-maligned Shkodran Mustafi in his place.
Mustafi’s defensive abilities are often questioned by Gooners and his role in Vardy’s goal has been analysed.
Footage shows fellow centre-back Gabriel seemingly telling Mustafi to get back in position as Leicester started an attack. The German doesn’t seem to listen and, seconds later, Gabriel has to try and get across to Under, who had been played in by Youri Tielemans. It left Vardy completely unmarked in the middle of the penalty area, with Mustafi about 10 yards away. Vardy is able to nod in Under's cross to win the match for his side.
A tweet quickly went viral blaming Mustafi for goal.
It reads: “Gabriel repeatedly tells Mustafi to cover the space instead, he just strolls & gets caught out. It’s a crime he’s still playing for Arsenal in 2020.”
It’s an assessment that many Arsenal fans agreed with. Check out the reaction:
After the defeat, Arsenal boss Mikel Arteta insisted his side were in control but didn't take advantage of any opportunities they created.
"The game the way it went, I felt we had total control in the first half and restricted them to nothing," he told BBC Sport.
"We were winning every ball, created a few chances and scored a goal I don't know how it got disallowed.
"They defended deeper in the second half, waiting for the mistake and in one moment they did it.
"Against this block, against so well organised teams, when you open them up you have to put the ball in the back of the net.
"They were similar against Manchester City, they scored with two set pieces and credit to them for what they have done but our players responded and I feel sorry for them.
"We have so many alternatives in the team and can have fluidity. It worked in some moments and there are options we can manage.
"We still had some moments after the goal but gave away too many free kicks. The effort that the boys put in, and the pressure the Leicester team put you under, it’s not an easy thing to do but we have to improve."
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