Arsenal demonstrated their resilience against a late Leicester surge to clinch a vital 1-0 victory and secure three crucial points.
The Gunners made the journey to King Power Stadium with a view to extending the gap between themselves and Manchester City to five points, albeit briefly, in their quest for the title.
Despite a less-than-remarkable start, Arsenal dominated possession in the opening exchanges. They thought they had taken the lead with a splendid strike from Leandro Trossard, only for VAR to rule it out for a foul on Danny Ward during the buildup.
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The decision seemed to suck the energy out of a fascinating first half, although the Gunners felt they deserved a penalty shortly thereafter.
The second half began dramatically, with Gabriel Martinelli scoring a goal but sustaining an injury in the process when Wilfred Ndidi accidentally stepped on his knee-cap.