https://www.bbc.co.uk/sport/boxing/50066825RIP
Boxer Patrick Day has died at the age of 27 - four days after sustaining head injuries in a fight against Charles Conwell.
The American was put in a coma with a serious brain injury on Saturday after he was knocked out in the 10th round of his super welterweight bout in Chicago.
Promoter Lou DiBella confirmed Day had died on Wednesday "surrounded by his family, close friends and members of his boxing team".
"He was a son, brother, and good friend to many," said a statement.
"Pat's kindness, positivity, and generosity of spirit made a lasting impression with everyone he met."
Day was taken from the ring on a stretcher after the conclusion of the fight on the undercard of Oleksandr Usyk heavyweight victory over Chazz Witherspoon in the US.
Fellow American Conwell, 21, wrote an emotional letter to Day following the fight.
"I never meant this to happen to you, all I wanted to do was win," he said.
"If I could take it all back, I would. No-one deserves this to happen to them."