It’s hard to believe but it is now four years to the day since Conor McGregor sent Jose Aldo to the mat with just a single left hand at UFC 194.The Irishman took just 13 seconds to knock out the UFC featherweight champion in a unification bout at the MGM Grand in Las Vegas.The fight was originally scheduled to take place at UFC 189 on July 11, 2015, but a rib injury forced a late switch from Aldo to Chad Mendes for the interim featherweight championship.Ten million dollars was made at the gate and Dana White boasted that the UFC 194 event was “the biggest thing we’ve ever done” and was an MMA record in the United States.The weigh-in even attracted 9,000 spectators, a few days later the Nevada attendance record was broken for the second time in a year by McGregor. 16,516 showed up, with the second biggest buyrate in UFC history watching from home as an enormous 1.2m tuned in.

With the left hook and two hammer blows on the mat, the fight became the fastest UFC title bout in history. The fight was over just a second quicker than Ronda Rousey’s 14-second submission win over Cat Zingano at UFC 184.

It was McGregor’s fifth knockout inside the Octagon and, for a record-breaking fifth time, he was awarded the UFC Performance of the Night. All in just two-and-a-half years in the Octagon.

It was Aldo’s first MMA loss in 10 years and his first in UFC after seven successive wins stretching back to UFC 129 in 2011.

With the 13-second victory, McGregor had a seven-match winning streak of his own. A streak that would end in his next fight with Nate Diaz in March 2016. McGregor got his revenge on Diaz at UFC 202 in a welterweight bout before claiming the UFC lightweight championship three months later from Eddie Alvarez.

McGregor, of course, then went on to spar with Floyd ‘Money’ Mayweather inside the boxing ring before making his long-awaited UFC return in October 2018.

He lost to a fourth-round submission to Khabib Nurmagomedov. The Notorious’ PPV numbers had more than doubled from his Aldo knockout four years ago to 2.4m for his latest fight at UFC 229.

Following the fight, Aldo would win the interim featherweight championship in a unanimous decision against Frankie Edgar before two defeats to Max Holloway in 2017. He has won two of his previous three fights, his latest fight was a loss to Alexander Volkanovski at UFC 237.

The legacy of the fight lives on and being the first time McGregor broke a million pay-per-view buys, it really was the coming out party for The Notorious on the global stage.