On September 3, Showtime will televise a championship boxing doubleheader brought to you by Don King Productions. The main event will feature WBO junior middleweight champion Daniel Santos vs. former regular WBA welterweight titlist Jose Antonio Rivera, while heavyweights Owen Beck and Sergei Lyakhovich go at it in the televised co-feature. Sources close to the situation have confirmed to Boxingtalk that the card will take place at the Gund Arena in Cleveland, Ohio. Also on the show could be a rematch between two Ohio heavyweights, Larry Donald and Ray Austin. REMEMBER WHERE YOU HEARD IT FIRST! (9:29 PM ET)