Tom Loeffler, promoter for IBF, WBA, WBC, IBO middleweight champion Gennady Golovkin (37-0-1, 33 KOs), believes his boxer could fight for another five years.
Golovkin, 35 years old, has been labeled as of late as a fighter who is starting to show his age.
Back in March, his streak of knockouts came to an end. After stopping 23 opponents in a row, he went the full twelve round distance in a close points win over Daniel Jacobs.
Then earlier this month Golovkin went the full twelve round distance for a second time, with a split draw against Canelo Alvarez at the T-Mobile Arena in Las Vegas.
There are many who feel GGG is not the same fighter that he was two years ago, but Loeffler is confident his boxer could continue his career - if he wanted to - for another five years at least.
"He said he could fight for another five years," Loeffler said to Sky Sports. "Gennady's style of punching power doesn't diminish, like we saw with George Foreman. The power-punching is [the attribute] that goes last, with an older fighter.
"Gennady's defence is vastly underrated. He's the one coming forwards and pressing the action but [after the Canelo fight] it didn't look like he was in a 12 round fight. No swollen or black eyes, just a few scratches.
"With the right motivation, this style would allow him to fight for as long as he wants. We just saw Wladimir Klitschko fight until he was 41, Floyd fought until he was 40. We could easily see Gennady fight for the next five years - but he won't stay in the sport longer than he needs to."
At the moment Golovkin is hoping to secure a rematch with Canelo. There are already discussions for the contest to take place in the first half of 2018. Canelo has already revealed that he doesn't plan to fight again until May, during Cinco De Mayo weekend.