In the last few months, numerous retired boxers have expressed the desire to enter the ring for exhibition bouts to raise money for charity.
Earlier this year, retired former world champions Julio Cesar Chávez and Jorge Travieso Arce returned to the ring to take part in an exhibition fight.
More recently, former undisputed heavyweight champions Mike Tyson and Evander Holyfield have discussed their intentions to showcase their skills in exhibition bouts - possible against each other.
In the last few months, Mexican greats Juan Manuel Marquez and Erik Morales have traded words in the press.
The two boxers faced some of the best fighters of their generation - but they never faced each other.
Marquez had his last pro fight in 2014, when he won a decision victory over Mike Alvarado.
In several interviews, Marquez claimed that Morales never wanted to fight him and avoided their potential title clash.
On the other side, Morales claims it was Marquez who passed on the opportunity by rejecting proposals and taking other fights in 2011 and 2012.
If the opportunity was on the table, Marquez would be very willing to do an exhibition fight against Morales.
"For me it would be to my liking to do an exhibition," Marquez said to ESPN Deportes.
"I would take [Morales] as an exhibition fight. You have to take the positive and the negative of doing that. I would like it. If I trained for this I would do it at one hundred percent. If you could do it, why not?"
And, Marquez said that if he got the opportunity to do that kind of fight he would prepare himself with his former coach, Hall of Fame trainer Nacho Beristain.