Boxer Patrick Day is in an 'extremely critical condition' in hospital after suffering a brain injury in his defeat to Charles Conwell.
Day, 27, was knocked out in the 10th round of his defeat to Conwell in Chicago on Saturday night.
The bout was on the undercard of the Oleksandr Usyk-Chazz Witherspoon fight.
Day required medical attention in the ring and was fitted with a neck brace and oxygen mask before being taken from the ring on a stretcher following the brutal defeat.
He was transferred to Northwestern Memorial Hospital where he underwent emergency surgery.
His promoter Lou DiBella confirmed he is in a coma with a "traumatic brain injury".
"Pat makes any room he is in a better place," said promoter DiBella.
"I've never met anyone who's met Patrick and not liked him.
"Never heard him utter a mean word. Never seen him greet someone without a big smile. Life doesn't seem fair sometimes.
"Please keep Pat in your prayers, thoughts and hearts."
Matchroom had organised the event in Chicago and promoter Eddie Hearn sent his wishes to the boxer.
“I followed him to the ambulance and he was still unconscious, went to the hospital with his corner team and his promoters, we’re all praying for him," Hearn said.
“I don’t want to speculate but he’s extremely unwell. It’s horrendous.
“It’s just a horrific situation, the last seconds of the round he was trying to win the fight, he was behind on the cards, he didn’t stop trying the whole fight."
Day was a Golden Gloves champion in 2012 and was also crowned USA welterweight national champion in the same year.
The 27-year-old has won 17 of his 22 fights to date.
Conwell added: "I give my blessings and concerns to him and his team. I hope he is OK. I know he is a great person."
