Miguel Marriaga is backing WBO, WBA lightweight champion Vasiliy Lomachenko to overcome IBF champion Teofimo Lopez when they collide on October 17 on ESPN.
Marriaga had previously suffered a stoppage loss at the hands of Lomachenko.
"Lomachenko will win. He's too good," Marriaga told George Ebro. "Lomachenko is one of the best in the world, with a lot of travel, skills... for me it was satisfying to have shared the ring with him. It was a great experience and I think I learned from that fight.''
Marriaga had made three attempts in world titles fights in the past, with all of the bouts ending without his hand being raised.
He was scheduled to get another crack in March, at then WBO featherweight champion Shakur Stevenson.
But the entire event was canceled due to the coronavirus pandemic.
And then in July he saw another scheduled fight go down the drain, after opponent Mark John Yap was severely overweight.
Now Marriaga will return to the ring on September 12, when he faces durable contender Joet Gonzalez.
"We are active as always, training a lot in Miami and hoping for the best for this new match against Joet Gonzalez,'' Marriaga said.
"I know he's a good fighter, he's also preparing at hundred percent. He's making sure that he can bring the best he can bring. Like every Mexican warrior, he likes to come [and fight], but we're going to be ready for any tactic or style.
"The main thing is to fight for a world title again. I've fought for a world title three times and it couldn't happen [where I won it], but I don't lose the desire to become a world champion. I couldn't make it because I fought those top boxers. I hope the fourth time will happen.''