IBF light heavyweight champion Chad Dawson (L) and former champion Antonio Tarver, both of the U.S., pose during a news conference at the Hard Rock Hotel & Casino in Las Vegas, Nevada May 7, 2009. Dawson will attempt to retain the title that he took from Tarver when the boxers meet for a rematch at the Hard Rock on May 9. REUTERS/Las Vegas Sun/Steve Marcus (UNITED STATES SPORT BOXING)