The Arsenal defender was set to miss a trio of games after his much-maligned reaction to Costa’s incendiary tactics on Saturday cost him a red card.
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But he still took that red in retaliation, and will sit out Arsenal’s trip to Leicester City on Saturday.
Gabriel admitted responsibility for his actions, and will also see a fine of around $15,000.
Costa was not given a red card for his behavior on Saturday, which included multiple hands to the face of Laurent Koscielny and predatory stalking of Gabriel. Upon review, the Blues forward picked up a three-game suspension for his behavior.