By Ryan Burton

Top Rank Hall of fame promoter Bob Arum, presents the  "No Trump" undercard final press conference Thursday afternoon to announce the WBO Super Middleweight World Title Bout in the co-main event featuring Arthur Abraham (44-4, 29KOs) versus Gilberto Ramirez (33-0, 16 KOs). Also for the Featherweight North American Boxing Organization Title Evgeny Gradovich (21-1-1, 9 KOs) will face Oscar Valdez, Jr. (18-0, 16 KOs).  For the WBC Super Lightweight Continental Amercias title, Jose Ramirez (16-0, 12 KOs) will go against Manny Perez (25-11, 6 KOs).  

Gilberto Ramirez (33-0, 24 KOs), from Mazatlan, Mexico, co-promoted by Zapari Boxing Promotions, the WBO No. 1 super middleweight contender and mandatory challenger, will get his first world title shot when he challenges Abraham (44-4, 29 KOs), of Berlin Germany. 

Valdez (19-0, 16 KOs), of Nogales, Mexico, the WBO's No. 1 featherweight contender, will defend his NABO featherweight title against former International Boxing Federation (IBF) featherweight champion Gradovich (21-1-1, 9 KOs), a Russian native who lives in Oxnard, Calif. 

Jose Ramírez (16-0, 12 KOs), of Avenal, Calif., and a 2012 U.S. Olympian, will defend his World Boxing Council (WBC) Continental America super lightweight title against Perez (25-11-1, 6 KOs), of Denver, CO.

These six warriors boast a combined record of 158-16-2 (96 KOs) -- a winning percentage of 90% -- with a victory by knockout ratio of 61%.

Promoted by Top Rank®, in association with MP Promotions and Tecate, the Pacquiao vs. Bradley championship event will take place on This Saturday! April 9, at the MGM Grand Garden Arena in Las Vegas, Nevada.  It will be produced and distributed live by HBO Pay-Per-View® beginning at 9:00 p.m. ET / 6:00 p.m. PT.  The Abraham vs. Ramirez world championship fight will be co-promoted by Sauerland Event and Zapari Boxing Promotions.

Remaining Tickets to Pacquiao vs. Bradley world championship event are priced at $1,204, $804, $604, $404, $254 and $154, not including applicable service fees.  To charge by phone with a major credit card, call Ticketmaster at (800) 745-3000.  Tickets are also available for purchase at mgmgrand.com or ticketmaster.com.