Richard Torrez Jr, (12-0, 11 KO) a U.S. Olympic silver medalist, takes a step up in class against Italian Olympian Guido Vianello (13-2-1, 11 KO) in a 10-round main event on Sunday, April 6 (Almaty, Kazakhstan time (GMT+05:00) at Pearl Concert Theater at Palms Casino Resort in Las Vegas.