( CNN ) -- Famed boxer Manny Pacquiao prepared to square off Saturday against Juan Manuel Marquez , hoping to retain his championship and affirm his supremacy after controversy surrounded their first two bouts . Pacquiao , who also serves as a representative in the Filipino Congress , is regarded by many as the best pound-for-pound fighter in the world and has won 53 of his 58 career fights . Marquez , though , insists he should have been declared the winner in their two clashes to date . The two look to settle the score Saturday at the MGM Grand Garden Arena in Las Vegas . The Filipino entered the bout having won 10 titles at eight different weight divisions in his glittering career , from flyweight ( for boxers between 108 and 112 pounds ) up to super welterweight ( 148 to 154 pounds ) . The Ring magazine , among other publications , ranks Pacquiao as the world 's best pound-for-pound boxer . That said , there 's some doubt about his supremacy over Marquez . The first bout in 2004 was scored as a draw , while Pacquiao won a split decision in the rematch four years later . The Mexican has been seen sporting a T-shirt that says `` Marquez beat Pacquiao twice ! ! '' and claims he will put the record straight when they step into the ring for the third time . `` Everyone , including many of my countrymen , believe he ( Pacquiao ) really won those fights , '' Marquez said through an interpreter . Pacquiao though , said prior to Saturday 's contest that the third chapter will resolve the debate once and for all . `` He kept on saying he got robbed in the first two fights . This fight will answer all the doubts and all the questions , '' he said at a news conference in Las Vegas . If Pacquiao defeats Marquez , the next big fight for the General Santos City native could be a long awaited showdown with Floyd Mayweather Jr. , the other superstar of his boxing generation .
Manny Pacquiao will fight Juan Manuel Marquez in Las Vegas . The two are expected to meet on Saturday at the MGM Grand Garden Arena in a bout that could be worth as much as $120 million. Pacquiao has indicated he may finally fight Floyd Mayweather soon .