(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 don'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.  QUESTIONS:

Q1:
1. Is Manny Pacquiao from Mexico?
2. Does Manny Pacquiao come from Mexico?
3. 
Q2:
1. How old is Juan Manuel Marquez?
2. What is Juan Manuel Marquez's age?
3. 
Q3:
1. Was Juan Manuel Marquez victorious against Manny Pacquiao in 2004?
2. Did Juan Manuel Marquez beat Manny Pacquiao in 2004?
3. 
Q4:
1. Was Juan Manuel Marquez victorious against Manny Pacquiao in u20131939?
2. Did Juan Manuel Marquez beat Manny Pacquiao in 2011?
3. 
Q5:
1. What did the crowd do in 2011?
2. What was the audience's reaction to the 2011 fight outcome?
3. 
Q6:
1. When did the crowd boo?
2. At what point did the audience express their disapproval?
3. 
Q7:
1. Did Juan Manuel Marquez think he should have won the 2011 fight?
2. Was Juan Manuel Marquez of the opinon that he should have come out on top in 2011?
3. 
Q8:
1. Who wants to see Juan Manuel Marquez and Manny Pacquiao fight for a fifth time?
2. Who would like to watch a fifth row between Juan Manuel Marquez and Manny Pacquiao?
3. 
Q9:
1. Who did Juan Manuel Marquez promise he would retire?
2. To whom did Juan Manuel Marquez swear to stop boxing?
3. 
Q10:
1. When did Juan Manuel Marquez say he would retire?
2. At what point did Juan Manuel Marquez promise to leave boxing?
3. 
