Junior middleweight Patrick Day was in a coma following emergency brain surgery after suffering a brutal 10th-round knockout at the hands of prospect Charles Conwell on Saturday night at Wintrust Arena in Chicago.

Conwell, a 2016 U.S. Olympian from Cleveland, dominated the fight, dropping Day with right hands in the fourth and eighth rounds before landing two rights and a left hook that knocked him out cold in the 10th round, causing referee Celestino Ruiz to wave off the fight at 1 minute, 46 seconds.

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Day remained unconscious as he was taken to an ambulance and then suffered a seizure before arriving at the hospital’s emergency room for treatment, according to sources.

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