#4 Conor McGregor (c) vs Eddie Alvarez - UFC 205
UFC 205 may have been the most stacked card in history up to that point (217 undoubtedly topped it). 3 title fights and UFC's first-ever show in Madison Square Garden (and New York City, period).
The main event saw Featherweight champion Conor McGregor go to the Lightweight division to challenge Lightweight king Eddie Alvarez. The hype was real and McGregor would successfully become the first-ever double champion in UFC history.
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What McGregor displayed was an absolute masterclass of a performance, flawlessly decimating Alvarez throughout. By round 2, he would finish Alvarez and secure the Lightweight title, something that he would never defend.
#3 Khabib Nurmagomedov (c) vs Conor McGregor
We all know the story behind this one. We've seen animosity between fighters for fights before, but this was truly another level. McGregor was his usual self, getting personal on all levels.
It was here that McGregor learnt that getting inside someone's head is a two-edged sword. Either they come charging at you and falter the way Jose Aldo did, or they make sure to absolutely decimate you on every level, the way Khabib did.
The fight was a dominant display for Khabib, who exposed McGregor's wrestling and took him down. McGregor actually did win one round (the first round Khabib ever lost in UFC), but even then, not much damage was done.
McGregor would fall victim to Khabib's dominance, and the Russian champion would submit McGregor in round 4, getting one over his arch-rival.
The post-fight incident is a whole other ordeal that requires another article in itself.