The Mexican Independence Day Weekend boxing extravaganza headlined by the Julio Cesar Chavez Jr. vs. Sergio Martinez world middleweight championship will feature four bouts on the live pay-per-view undercard, including two world championship showdowns. Undefeated WBA super featherweight champion and Cuban expatriate Guillermo “El Chacal” Rigondeaux (10-0, 8 KOs) will defend his world title against knockout artist Roberto Marroquin (22-1, 15 KOs). Former world champion Roman “Rocky” Martinez (25-1-1, 16 KOs) and Miguel “Barreterito” Beltran, Jr. (27-1, 17 KOs) will battle for the vacant WBO junior lightweight title. One-time world title challenger Matthew “Mack The Knife” Macklin (28-4, 19 KOs) will rumble with former WBA super welterweight champion Joachim Alcine (33-2-1, 19 KOs) in a 10-round middleweight bout. The pay-per-view undercard telecast will open with undefeated University of Notre Dame champion Mike Lee (10-0, 6 KOs) in a six-round light heavyweight bout against an opponent to be named soon.