WBO welterweight champion Manny Pacquiao is looking very focused during a session in Manila. Pacquiao is preparing for the mega-fight of the last few years, when he challenges WBA/WBC welterweight champion Floyd Mayweather Jr. in a long awaited unification bout on May 2nd at the MGM Grand in Las Vegas. Rival networks HBO and Showtime will come together to stage the fight on a joint pay-per-view event. Most insiders expect the pay-per-view to become the biggest financial success in the history of the sport. The current record holder is Mayweather vs. De La Hoya, which generated 2.4 million pay-per-view buys in 2007.