Photos: Abraham, Ramirez, Valdez, Ramirez, Gradovich Workouts

LAS VEGAS, NV – World Boxing Organization (WBO) super middleweight world champion ARTHUR ABRAHAM, undefeated contenders GILBERTO "Zurdo" RAMIREZ, ÓSCAR VALDEZ and JOSE RAMÍREZ and former world champion EVGENY GRADOVICH kicked off Fght Week by hosting a Las Vegas Media Workout at the Top Rank Gym. Photos by Mikey Williams.

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 MANNY 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.