By Jose Luis Camarillo

Promoter Fernando Beltran of Zanfer Promotions has confirmed to BoxingScene.com/NotiFight.com that there are serious ongoing negotiations to finalize a fourth fight between Manny Pacquiao (54-4-2, 38KOs) and Juan Manuel Marquez (54-6-1, 39KOs) - at the MGM Grand in Las Vegas on December 1 or December 8.

A date of November 10th has been mentioned, on HBO pay-per-view, but Beltran says the only two dates being discussed with Top Rank, who promote Pacquiao, fall in the month of December in Las Vegas.

Beltran says the fight is "very close to materializing." But, there is still no contract and Pacquiao has yet to make a final decision as to the opponent. Beltran is confident about Marquez's chances to get the fight and says his fighter is without question the frontrunner to land the opportunity. If Pacquiao falls through, Beltran and Marquez might focus their energy on landing a fight with WBO welterweight king Timothy Bradley.

"We are first in line [to fight Pacquiao], without any doubt. [However], Juan Manuel and I do not depend on Pacquiao. We have various options; one of them is Tim Bradley, but yes [I think] the fight with Pacquiao will [happen]. We just need to get all of the conditions in writing. On Monday I met with Márquez [in Tijuana] and we talked [but there is no contract to show]. [The fight would happen] in Las Vegas, although the Pacman insists that he would beat Marquez in his home [of Mexico]. And the two dates discussed: 1st or 8th of December," Beltran said.

The other two boxers reportedly being considered by Pacquiao include Bradley and former three division champion Miguel Cotto.