Former light heavyweight champion Antonio Tarver of the U.S. is shown during a workout in Las Vegas, Nevada, May 6, 2009. Tarver will attempt to regain the IBF title he lost to Chad Dawson, also of the U.S., when the boxers meet for a rematch at the Hard Rock Hotel & Casino in Las Vegas on May 9. REUTERS/Las Vegas Sun/Steve Marcus (UNITED STATES SPORT BOXING)