Russian boxer Maxim Dadashev died of injuries suffered during a bout Friday night at MGM National Harbor casino in Oxon Hill, Md., his wife and officials from Top Rank promotions said Tuesday afternoon.

Dadashev, 28, had been hospitalized since late Friday night following surgery for massive head trauma from a loss to Subriel Matias in their 140-pound International Boxing Federation world title eliminator.

Dadashev’s wife, Elizaveta Apushkina, traveled from Russia over the weekend to be with her husband,