LAS VEGAS — In the main supporting bout of the Bradley-Rios WBO world welterweight title fight at the Thomas & Mack Center here Saturday night, Vasyl Lomachenko (5-1-0, 3KO) of Ukraine dominated and then stopped Romulo Koasicha of Mexico at 2:35 of round 10. Lomachenko has now successfully defended his WBO featherweight title for the third time.
