(CNN)Boxer Charles Conwell has written a poignant letter to Patrick Day, who is in a critical condition following their super-welterweight bout on Saturday, saying that he 'never meant this to happen to you."
Boxer Charles Conwell pens poignant letter to rival left in coma after fight
Day experienced a traumatic brain injury as a result of a 10th-round knockout his promoter, Lou DiBella, confirmed. The 27-year-old boxer underwent emergency surgery on Sunday at Northwestern Memorial hospital, Day and remains in a coma.
"All I wanted to do was win," Conwell wrote in a social media post that he signed off with the hashtag #champpatrickday. "If I could take it all back, I would.
"No one deserves this to happen to them. I replay the fight over and over in my head thinking what if this never happened and why did it happen to you."
The contest between Conwell and Day was on the undercard of Oleksandr Usyk's debut heavyweight fight where he beat Chazz Witherspoon.
After suffering the knockout in the 10th round of their super-welterweight fight, the 27-year-old Day received medical treatment in the ring before eventually leaving on a stretcher.
Day was the New York Daily News Golden Gloves champion in 2012 and has won the WBC Continental Americas Super Welterweight Title and the IBF Inter-Continental Super Welterweight Title.
The 21-year-old Conwell said this would be the last time he spoke on the matter because it was "a sensitive topic" for Day's family and friends, himself and the sport of boxing.
"I can't stop thinking about it myself," the 2016 Olympian continued. "I prayed for you so many times and shed so many tears because I couldn't even imagine how my family and friends would feel.