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The Dagestani fighter used his head on a number of occasions in the early days of his career, especially in 2010, when he faced Ali Bagov at the Golden Fist Russia event in Moscow.
As you can see in the below footage, "The Eagle" uses his familiar grappling style to send his opponent to the mat, before using his head like a battering ram.
The UFC operated with a limited rule set in the early 1990's, and hair pulling, groin strikes and headbutting were allowed until years later.
In terms of the fight, Khabib eventually won by unanimous decision and extended his unbeaten record to 8-0 after showcasing his unorthodox head movements.
The Russian, as we all know, is 13-0 in the UFC after bouts against the likes of Conor McGregor, Edson Barboza, Dustin Poirier and Justin Gaethje.
After his latest triumph at UFC 254, Khabib left his gloves on the Octagon canvas and announced his retirement from the sport following the tragic passing of his father and coach, Abdulmanap.
"There's no way I'm going to be back without my father," Khabib told Jon Anik.
"I spoke to my mother. She don't know how I fight without father, but I promised it's going to be my last fight, and if I give my word, I have to follow it."
You'd expect Khabib to be a man of his word but UFC president Dana White is confident 'The Eagle' will have one more fight as he vies to move to 30-0 in MMA.
"I'll tell you this and I haven't told anybody this yet, but Khabib and I have been talking," White said on the Zach Gelb Show.
"He was completely emotional that night when he got through that fight. I have a feeling that he might go for 30-0."
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