By Rene Umanzor & Miguel Rivera

According to WBO junior welterweight champion Juan Manuel Marquez (54-6-1, 39KOs), he already started training for a potential fourth fight with Manny Pacquiao (54-4-2, 38KOs). Marquez has been discussing the training schedule with his coach, Nacho Beristain.

On Sunday, Beltran said the fight was "95% done."

Marquez has already accepted the fight. The boxer is now waiting, and says the ball is in Pacquiao's court.

Marquez said - "it's up to Manny Pacquiao" - when asked for a status on the fight.

If Pacquiao, for whatever reason, decides to fight Timothy Bradley in a rematch or elects to wait until 2013 to fight again, Marquez has already discussed two possible scenarios.

The Mexican fighter said - "I'm going to return in November or early December. We have discussed fighting in Arena Mexico [if Pacquiao doesn't agree]."

The two boxers have fought each other three times. All three bouts have ended with controversy. A twelve round draw in 2004, Pacquiao winning a controversial split decision in 2008, and Pacquiao winning a controversial majority decision last year.