LAS VEGAS, NEV. (June 28, 2012) – Undefeated World Boxing Council (WBC) middleweight champion and Son of the Legend, JULIO CÉSAR CHÁVEZ JR., and two-division world champion SERGIO MARTINEZ, along with their promoters Bob Arum, Fernando Beltran and Lou DiBella, will embark on a four-city / two-nation international media tour to promote their eagerly-awaited Méxican Independence Day middleweight championship battle, beginning on Tuesday, July 10. Chávez Jr. vs. Martinez will take place Saturday, September 15, at the Thomas & Mack Center, on the campus of the University of Nevada at Las Vegas. It will be produced and distributed live by HBO Pay-Per-View®, beginning at 9 p.m. ET / 6 p.m. PT.