
18. Conor McGregor (2021)
McGregor rocked up to Abu Dhabi in 2021 on a yacht. The Irishman hadn’t fought for a year after beating Donald Cerrone in style. His next fight was a rematch against Dustin Poirer. He was supremely confident because he had already knocked The Diamond out in their previous meeting. But lighting doesn’t strike twice in the same place. McGregor discovered this the hard way.

In short, “The Notorious” and his team made a massive mistake. They looked past Poirier and towards a potentially lucrative boxing match against Manny Pacquaio. However, they paid a massive price because Poirier unleashed the perfect game plan. He targeted McGregor’s calves and compromised the Irish fighter badly. Then, he finished McGregor off with a brutal knockout and McGregor received what he deserved.