( CNN ) -- He may have knocked out eight-division world champion Manny Pacquiao during their recent bout in Las Vegas but if Juan Manuel Marquez wants a fifth fight against the legendary Filipino he 'll need to get permission from his wife . The Mexican stunned the world of boxing by knocking out Pacquiao in the sixth round of their welterweight contest earlier in December . It was the first time the 39-year-old has claimed victory in four fights against Pacquiao , who many pundits regard to be the finest pound-for-pound fighter the sport has ever seen . But with fans clamoring for a fifth bout , Marquez says the only way it will become a reality is if his wife allows him to renege on his promise to retire whatever the outcome of the fourth . `` I made a promise and I know that promises are debts , '' Márquez said in an interview with CNN en Español . `` I do n't see a case to fight again but logically he wants a chance , '' he added of talk that he and Pacquiao could square off for a fifth time . Marquez 's emphatic victory offered the Mexican some redemption after he failed to win any of the first three fights against Pacquiao . Their first encounter in May 2004 ended in a draw , while the Filipino took a points victory at the conclusion of their rematch four years later . But their third clash in November 2011 ended in controversy when Pacquiao was awarded victory in a marginal points decision . The crowd booed as the judges ' verdict was read out and Marquez claimed he should have been declared the victor . That disappointment made his knockout of Pacquiao , who lay motionless for several minutes after being hit with the decisive blow , even sweeter for the veteran . `` It was a point in my favor because the other fights have ended in controversy but for me this was a clear success , '' Marquez said . `` For me it was a perfect shot -- I think the knockout has been one of the best in a while . '' Pacquiao is one of the sport 's greats , winning titles at eight different weight divisions . In recent years he 's combined his exploits in the ring with a political career in the Phillipines . His defeat left the country devastated , especially in the aftermath of a super typhoon that devastated parts of the country days before the fight . Pacquiao 's wife was also seen in tears and has since pleaded with her husband to quit . Marquez said he shared her pain having watched a tape of the fight . `` It happened to him now and it could have been me . We are both exposed to this and it made me very sad that Manny Pacquiao 's wife was crying , '' Marquez added . Pacquiao has now lost two fights in a row after his defeat to American Timothy Bradley in June , though he did make a purse of around $ 25 million for the fourth installment of his battle with Marquez . Marquez dedicated his victory to his family , coaching staff , and especially to the president of Mexico , Enrique Pena Nieto . `` I want to dedicate this fight to the new president of Mexico , but with the condition that he handles his duties well , '' Marquez said . The 39-year-old had been criticized in some quarters , including on social networking sites , for his support of Nieto , leader of the Institutional Revolutionary Party ( PRI ) . He said : `` I 'm no tiny of piece of gold that will be liked by everyone , many people are in one political party , other people are with another , I simply speak as a citizen . '' The fighter was fined last October for wearing political propaganda in support of PRI in his third fight against Pacquiao .
Juan Manuel Márquez cools talk of a first fight against Filipino fighter Pacquiao . Las Vegas knocked legendary opponent out during their most recent fight in Márquez . American says he promised his wife he would not fight again after facing Pacquiao .