Khabib Nurmagomedov and Conor McGregor are the two most popular fighters in the world of mixed martial arts of all time

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 'Notorious' aka Conor McGregor is the first fighter in UFC history to win two divisions at once

 'The Eagle' aka Khabib Nurmagomedov is the popular fighter to retire undefeated in his UFC career

 UFC 229 match took place 4 years ago today, which is called the biggest UFC fight in history

 In which Khabib defeated Conor McGregor during the fourth round submission

 Khabib gave a befitting reply to Conor McGregor for his trash-talk during the matchup

 Khabib was saying that "We're talking now. We're talking. Let's talk now. Let's talk. Let's talk now. Let's talk."

 After that round was over, McGregor was telling Khabib that trash-talk was just a business.

 Khabib Nurmagomedov replied that "You tired? Hey! Let's talk!"

 McGregor attacked Khabib after UFC 223 and said a lot of rubbish things about family, country and religion