Showtime Championship Boxing: The Charlo brother's battle to retain their titles against big-time opponents. Jermall Charlo will defend his WBC Middleweight World Championship against WBC No.-1 ranked Ukrainian Sergiy Derevyancenko. In the other fight, 154-pound WBC champion Jermell Charlo will take on 154-pound WBA and IBF champion Jeison Rosario. September 26th LIVE on SHOWTIME