By  Elisinio Castillo

Earlier this month, WBA super bantamweight champion Guillermo Rigondeaux took a huge risk when he moved up in weight, by two full divisions, to challenge WBO super featherweight world champion Vasyl Lomachenko.

Before a sold-out crowd at The Theater in Madison Square Garden, Rigondeaux was dominated for six rounds and refused to continue any further.

He cited an injury to his left hand as the reason to pack it in,

Rigondeaux's trainer, Pedro Diaz, felt his boxer was at a huge disadvantage to continue fighting any further.

But Rigondeaux's former trainer, Jorge Rubio, believes there were a lot of mistakes made in the boxer's camp that led to his loss.

Rigondeaux had left Diaz at one point to hook up with Rubio, but eventually found his way back to Diaz.

"All Cubans felt their defeat, but I knew what was going to happen. I said it, I'm always going to tell the truth and it's not always what you want to hear. What happened did not surprise me, but I did not expect the injury... the hand injury that kept him from fighting," Diaz told George Ebro.

"I already had six rounds against him, I'm sure if he would have fought in the other six rounds he would not be able to win - unless he got a knockout win.

"I do not believe [Rigo would win, even if he was healthy]. I saw some things that I don't want to say, because it would be a lack of professionalism to talk about another trainer, but there were things that happened... that I heard about and heard that they did not do... and that assured me of my belief that he was going to lose. There were also the factors of age, weight, inactivity and training that became a little abrupt, because you had to increase the weight of the muscles.

"I would have done things a different way and I assure you that with me he would have done better. Maybe it would have been a surprise [in the outcome if I had trained him], because I know how to work with Rigondeaux. He and I have the same rhythm and I think my work was good for him.. his turns on the sides, reaction, speed, we made it very concrete and we showed it in every fight."