Chicago boxer David Diaz and Chicago cruiserweight prospect and NBA star Kendall Gill will attend the 33rd annual “Fiesta del Sol” celebration on Saturday, July 30 on West Cermak Road in Chicago, it was announced today by Main Events CEO Kathy Duva. Between 2:30 – 4:30 pm Diaz and Gill will provide open-to-the-public workouts and sign autographs to promote their upcoming Aug 20 bouts at the Allstate Arena on the undercard of the Fernando Vargas-Javier Castillejo jr. middleweight showdown [details]