The red card handed to Lucas Torreira in the North London Derby will stand, his suspension set for three matches.
Torreira, 23, was shown a straight red in stoppage time of Arsenal’s 1-1 draw after sliding studs up into Danny Rose of Tottenham.
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The Uruguayan midfielder has played more than 2,000 minutes across 29 Premier League matches for the Gunners since arriving in August, scoring twice with two assists.
He’ll miss matches against Manchester United, Newcastle United, and Everton.
While that will hurt the Gunners chances of cementing a Top Four spot, it will allow Unai Emery to deploy the diminutive star without reservation in the Europa League.