The two top scorers in the league were on target at the Emirates in a result that doesn't really do either side any favours.
Pierre Emerick Aubameyang got his 20th goal of the season when Bukayo Saka teed him up just before the first half drinks break
And Arsenal were good value for the lead with little threat in the first half coming from Leicester, but they failed to take their chances and capitalise on that lead.
Brendan Rogers made changes at half time and the foxes came out looking more dangerous in the second half.
The game turned on the 75th minute, when Eddie Nketiah who had only just come on as a substitute, went in hard on Leicester’s James Justin in a 50/50 challenge.
Referee Chris Kaavanagh immediately gave him Yellow Card, but upgraded it to a Red after using the VAR pitchside screen.
Its a decision that will affect the run in as it means Nketiah will now miss Arsenal’s next three games, including Sunday’s north London derby against Tottenham. And it was to have a big effect on the game as well.
Ten minutes after the sending off Jamie Vardy was on target with his twenty second goal of the season.
Despite the man advantage and eight minutes of injury time, Leicester were unable to get a winner.
The result means Leicester drop to 4th in the table and the Gunners miss the chance to go level with Wolves.