American boxer Patrick Day died four days after suffering a serious brain injury during his knockout defeat to Charles Conwell last weekend, promoter Lou DiBella said in a statement.
The 27-year-old super welterweight had undergone emergency surgery after being knocked out by Conwell on Saturday at Chicago’s Wintrust Arena.
“On behalf of Patrick’s family, team, and those closest to him, we are grateful for the prayers, expressions of support and outpouring of love for Pat that have been so obvious since his injury,” he said said.
Day, who had been in a coma following surgery at Northwestern Memorial hospital, died surrounded by family and friends.
The American fighter had been carried unconscious from the ring on a stretcher on Saturday following his 10th round knockout.
Before he became a professional fighter, Day was a highly decorated amateur.
He won two Nationals titles, the New York Golden Gloves tournament and was an Olympic Team alternate, all in 2012.
He turned pro in 2013 and captured the WBC Continental Americas championship in 2017 and the IBF Intercontinental championship in 2019.
In June 2019, he was rated in the top 10 by both the WBC and IBF. As of Saturday, Day's record stood at 17-4-1, with six knockouts.
 "Dubai Submerged In Flood")