Press Release: WBC lightweight titlist David Diaz leaves Monday afternoon for Mexico City for an international press conference with three-division world champion Erik Morales to be held on Tuesday. The press conference is in anticipation of their showdown, “War For 4!”, on Saturday, August 4th at the Allstate Arena in Rosemont, IL, just outside of Chicago and broadcast live on pay-per-view.   The show will be promoted by Bob Arum’s Top Rank Inc., in association with Chicago’s Dominic Pesoli’s 8 Count Productions. Tickets are on sale now through Ticketmaster at their website www.ticketmaster.com or by calling 312-559-1212. Said Diaz, “I’m back on Tuesday night so I’m only missing one day of camp. It’s good for business to go down to Mexico City.” The pay-per-view broadcast will also feature two additional world title fights and the Chicago debut of undefeated welterweight Julio Cesar Chavez, Jr.  The  Morales vs. Diaz pay-per-view telecast, beginning at 9 p.m. ET/6 p.m. PT, has a suggested retail price of $44.95, will be distributed by HBO Pay-Per-View.