By Miguel Rivera

According to Hall of Fame trainer Ignacio "Nacho" Beristain, it is very likely that December 2 will be the last time that he works the corner of undefeated Rey Vargas, who is the super bantamweight champion of the World Boxing Council.

Next Saturday night at Madison Square Garden in New York City, Vargas will make the second defense of his title against Colombian Oscar Negrete.

The fight, which is being televised by HBO in the United States, is the co-featured attraction to Miguel Cotto's final career bout against Sadam Ali.

Nacho reveals that his relationship with Vargas has become a bit strained, because the younger fighter wants a lot more time than the veteran coach is able or willing to give.

Vargas is apparently not satisfied with the amount of time that he receives from Nacho throughout the year and wants a near exclusive partnership - which Narcho cannot give him as he trains several other fighters. 

"I'm going to accompany him (to New York), and maybe it's the last time we're together," said Beristain to ESPN Deportes. "Sometimes I do not have enough time to be with him and I've never been an exclusive trainer to any fighter."

Nacho also denied claims that at one point he was the exclusive trainer of Juan Manuel Marquez.

 "I was with Juan Manuel but not exclusive," Nacho said. "[Vargas] wants near exclusivity, he is very demanding and I have many other fighters to whom I have given my work, effort - and do not want to leave them in the hands of someone else. I told him to look for someone who could give him what he wants."

Nacho said that the only problem they have with Rey is the coordination of time, because Vargas trains a few days in Otumba to avoid a long trip to the Romanza gym in Mexico City.