Young Russian boxer, Maxim Dadashev has died at the tender age of 28 following injuries he sustained in his IBF light-welterweight fight against Subriel Matias.
Dadashev was reportedly unable to walk to the dressing room after his bout was stopped by trainer Buddy McGirt at the end of the 11th round on Friday.
He was hospitalised with bleeding on the brain and underwent emergency surgery but failed to recover.
The Russian Boxing Federation say they have opened an investigation.
Secretary general Umar Kremlev suggested there was “some kind of violation”, adding in a statement: “We lost Maxim Dadashev. He was our young prospect.
“We will fully support his family, including financially. We will complete the investigation into the circumstances surrounding this fight, we need to know the truth about what happened.
“This happens in any sport. I think some human factors intervened, there was some kind of violation.”