McGregor beat Poirier inside two minutes in September 2014 and just over two years later he became the first fighter to simultaneously hold two UFC titles
The Russian has retired unbeaten with an unbeaten professional record of 29-0. Nurmagomedov fighting for the first time since the death of his father this summer, produced a superb display to finish UFC interim champion Gaethje with triangle-choke and retain his lightweight title.
He was beaten earlier in the year.
Nurmagomedov holds the mixed martial arts record for the longest active undefeated streak, 28, which he is putting on the line on Saturday.
Two fights were scrapped from the event – one due to a late positive Covid-19 test and another after a fighter fainted before his scheduled walk out.
Calderwood was lined up to fight Valentina Shevchenko but the women’s 125lb champion pulled out with a leg injury and has since undergone surgery
The victor described it as “one of the most technical fights” he had contested.
The Liverpudlian has his sights set on Israel Adesanya
Event took place in Abu Dhabi