San Antonio, Texas --- (L-R) Undefeated WBC World Middleweight Champion Julio Cesar Chavez Jr., superstar three-time world champion Nonito "The Filipino Flash" Donaire, former world champion Wilfredo Vazquez,Jr. and  #1 ranked Marco Antonio Rubio pose at the press conference at the Alamodome in San Antonio,Texas, Thursday for their upcoming world title fights, Saturday,Feb. 4, televised live on HBO World Championship Boxing from the Alamodome in San Antonio,Texas. Promoted by Top Rank, in association with Zanfer Promotions, All Star Boxing and Tecate, Chavez Jr. takes on Rubio and Donaire battles Vasquez Jr. in their doubleheader main events. --- Photos by Chris Farina/Top Rank.