WBO middleweight champion Janibek Alimkhanuly (15-0, 10 KOs) easily defeated IBF champion Vincenzo Gualtieri (21-1-1, 7 KOs) by a sixth-round TKO in their two-belt unification contest at 160 in a fight that was one-sided from start to finish at the Fort Bend Epicenter in Rosenberg, Texas.