The 41-year-old Kazakh fighter is one of the finest boxers in the history of the sport and can claim to be one of the pound-for-pound best over the years.

He is currently without a belt after vacating the IBF and WBA straps at 160lbs, but he remains a huge box office draw after he took on Canelo Alvarez in their trilogy rematch last year.

He has not fought since, while Smith is preparing for a rematch of his own, against Chris Eubank Jr., this Saturday.

"He's a big name himself," Smith said of Eubank Jr. to Sky Sports. "I feel me and Eubank's still the biggest fight in Britain that's been made and up till now is still the biggest fight to happen. We're going into September and it's the biggest fight that's happened [in Britain]. You struggle to see where we're going to pull a bigger fight than this from."

At 35, Smith is not yet intending to retire, adding: "I've never once sat and thought: 'Right, time to have a think about a way out,'" he said. "I live a good life which is not really hard to see because of what I'm still doing.

"I'm on pay-per-view again, top of the bill, a 15-year career for me to still be there, it's not like I'm trying to chase one last payday. I'm not hanging about. That speaks for itself.

"I've been pro 15 years in October. It's a long time for me still to be there. Still at the top."

Turning to Golovkin, he thinks there may be a chance for one more bout.

"He might have one last fight," he suggested.

"That would be something else. Me to have the two greats of my era especially, Canelo and Golovkin, on my CV, it would be unbelievable.

"I just need to concentrate on Chris. I beat Chris again, I'm sitting in a good position."