FILE - In this Oct. 20, 2018, file photo, Maxim Dadashev, of Russia, left, hits Antonio DeMarco, of Mexico, during a junior welterweight bout in Las Vegas. Maxim Dadashev has died after suffering a brain injury in a fight in Maryland. He was 28.The Russian Boxing Federation said Tuesday, July 23, 2019, that Dadashev died "as a result of the injuries he sustained" in Friday's, July 19, 2019, light-welterweight fight with Subriel Matias at the Theater at MGM National Harbor in Oxon Hill, Maryland. (AP Photo/John Locher, File)