Former WBC lightweight champion David Diaz (35-3-1, 17 KOs) will battle Denver-based spoiler Robert ?Red Hot? Frankel on January 28th in the ten round main event at Chicago?s UIC Pavilion. Frankel (27-9-1, 4 KOs), is riding a six bout winning streak, including wins against notables including Ricardo Dominguez, Bobby Pacquiao, Ramon Montano and Derrick Campos.