And the 31-year-old Russian star recently posted on Instagram an emotional tribute to his late father, who was also his MMA coach.
"Father, I will miss you," he posted.
"You were my father, friend, brother and coach in one. You taught me practically everything I know. I hope you were pleased with me."
Beckham, 45, also took to the social media platform and commented on Khabib's post, sending his well-wishes to the UFC lightweight champ.
"Thinking about you and your family, my friend," the Manchester United legend posted.
Beckham and Khabib previously met in 2019 at the Parc des Princes as they watched Paris Saint-Germain beat Real Madrid 3-0 in the Champions League.
Khabib, who hasn't competed since his victory over Dustin Poirier last September, shared a photo of them together and called Beckham "legendary."
UFC legend Daniel Cormier, who is close pals with Khabib, believes it's unlikely that the 'Eagle' will now return to the octagon before the end of 2020.
Khabib is most likely set to make his next title defence against Justin Gaethje, who captured the interim lightweight championship in his sensational UFC 249 win over Tony Ferguson.
UFC president Dana White believes that the title fight could still happen at UFC 253 in September, but he admitted that he's in no rush to bring Khabib back to the octagon.
"I don't think it's off the table. I'm just waiting to hear from him. I'm not messing with Khabib," he said.
"I'm leaving him alone until he's ready to talk and letting him mourn and do what he has to do.
"I reached out to him the day of... I haven't heard back from him since."
Featured Image Credit: Instagram/Khabib Nurmagomedov
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