WBA, IBF, IBO middleweight champion Gennadiy “GGG” Golovkin is inching closer to his trilogy showdown with Saul 'Canelo' Alvarez.

Golovkin will head up to 168-pounds to challenge Canelo for his undisputed super middleweight crown on September 17 at T-Mobile Arena in Las Vegas.

Their first two encounters took place at the middleweight limit of 160-pounds.

In 2017, they fought to a controversial twelve round split draw. In the rematch, which took place a year later, Canelo secured a close twelve round majority decision.

Golovkin believes he was robbed on the cards in both encounters.

“A lot of time has passed. We are different fighters now,” Golovkin told the Las Vegas Review Journal. “It’s the right approach to move on. Not to look back at the previous two fights and train with this idea that is a separate fight.

"I’m sure it’s not going to be an easy fight. My opponent is a champion, he has four belts, and he’s arguably the best fighter at that weight class. I’m jumping to the weight class for the first time and I’m fighting the best fighter in that class. Most likely I’ll feel fresh in that weight category. I think I’ll be ready for the physical standpoint. I think I’ll feel more comfortable in that weight class. On the other hand, I should say I feel extremely comfortable in my class. At 160."

At 40-years-old, Golovkin is nearing the end of his career and many observers have tabbed him as a solid underdog against Canelo.

During his long run at 160-pounds, GGG has picked up numerous big wins in the ring.

He admits, a win over Canelo in their upcoming trilogy would be the biggest victory of his career.

"It would be the biggest win in my career. It would be the best thing that happened. That would be very fulfilling," Golovkin said.