Khabib Nurmagomedov’s trainer Javier Mendez believes Jon Jones would beat Francis Ngannou.
For now the match-up is only theoretical, as Jones fights under the UFC umbrella and Ngannou has moved to PFL, and is also focusing on finding his way in boxing, too.
But such a fight would attract attention if two of the best fighters in the history of MMA could square up in the octagon.
Understandably, Mendez is someone who has considered how the pair would shake out if they were to meet.
He believes Jones would have the edge, telling Grosvenor Sport: “There is a reason why Jon Jones took three years out - to specifically train for a move up to heavyweight.
“The guy is very intelligent, he takes things seriously, he doesn't take any chances on wanting to lose. He's a winner and he will do anything he needs to do to win and in this case he's taken time to put the weight on properly.
“Jones’s technical aspect is superior to Ngannou. Ngannou has the power to knock anyone out but I give the edge to Jones based on an overall technical aspect.
“He's one of the greatest for a reason. He dissects you and knows how to take you apart.
"Do you remember when he was scheduled to fight Belfort and then Chael Sonnen stepped in on short notice and Jones said 'nope not fighting him' because he wasn't prepared for him?
"But even though Chael was an easier fight, he turned it down. That's what you get when you're dealing with Jones, a professional in the fight game in every aspect. “