Boxer Patrick Day is in an "extremely critical condition" after suffering a knockout loss to Charles Conwell in Chicago.
The 27-year-old American was stopped in the 10th round of his fight on the Oleksandr Usyk vs Chazz Witherspoon undercard, leaving him with "a traumatic brain injury".
Promoter Lou DiBella praised the super welterweight, who was taken to Northwestern Memorial Hospital.
"Pat makes any room he is in a better place," said promoter Lou 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."
While fellow promoter Eddie Hearn, who promoted the show, released a statement urging fans to keep Day in their thoughts.
The Matchroom boss wrote: "Our thoughts and deepest prayers are with Patrick Day and his family right now. We have been in constant communication with his promoter
"Lou DiBella who will provide further information at the appropriate time. Please keep Pat in your thoughts."
While Conwell tweeted his support to his opponent, writing: "My thoughts and deepest prayers are with Patrick Day and his family right now. His family will provide further information at the appropriate time. Please keep Pat in your prayers."
