Sports Russian boxer Maxim Dadashev undergoes emergency brain surgery after TKO loss, per reports July 20, 2019 Tom Schad, USA TODAY Comments Off on Russian boxer Maxim Dadashev undergoes emergency brain surgery after TKO loss, per reports Russian boxer Maxim Dadashev underwent surgery to relieve swelling on his brain after a TKO loss to Subriel Matias on Friday night.