Las Vegas, Nevada - On the championship doubleheader telecast where Juan Manuel Marquez goes for a historic fourth world title in as many different weight divisions when he takes on WBO European junior welterweight champion Sergey Fedchenko for the vacant WBO interim 140-pound world title, Brandon Rios will face Cuba's Richard Abril for the vacant WBA lightweight title at the Mandalay Bay in Las Vegas. Also, undefeated Mike Alvarado of Denver will face Mauricio Herrera. Undefeated lightweight Mercito Gesta is scheduled to open the pay-per-view at the Mandalay. Photos by Chris Farina/Top Rank.