Two boxers with a genuine disdain for each other will duke it out with bad intentions for a third time when Diego “Chico” Corrales defends his World Boxing Council (WBC) and RING lightweight titles against former world champion and longtime adversary, southpaw Joel “El Cepillo” Casamayor, on Saturday, Oct. 7, during a Free Preview Weekend on SHOWTIME, In the co-feature bout of a world championship doubleheader that begins at 9 p.m. ET/PT