Justin Gaethje delivered one of the most spectacular moments of a career already stuffed full of highlight-reel footage, knocking out Dustin Poirier with a head kick to win the BMF title. 

He exacted sweet revenge in his rematch with 'Diamond' and teed himself up beautifully to face the winner of October's lightweight title fight between Islam Makhachev and Charles Oliveira. 

It had been billed as a Fight of the Year contender and the opening five minutes did nothing to suggest otherwise. 

Poirier came out with slick boxing, landing clean combinations but accepting his fair share of horrible low kicks to his calf, the same kind he debilitated Conor McGregor with two years ago. 

It was an even contest, with Poirier perhaps shading the opening stanza, landing flush to the eye of his opponent, who pawed at it in irritation.  

But Gaethje made the brighter start to the second. He was landing with more frequency and then the killer blow came. 

He threw a picture perfect high kick with his right leg, connecting his shin to the chin of Poirier, who was out like a light. The Louisiana native was sent tumbling to the mat and ate a follow-up shot before Herb Dean could dive in and intervene. 

It was eerily similar to Leon Edwards' stunning head kick KO of Kamaru Usman to win the welterweight title in the very same Delta Center venue in Salt Lake City, Utah, last year. 

Gaethje's finish came with his right shin, whereas 'Rocky' produced his with the left, but the image and result was the same. 

'Unlike any other sport on Earth, you rarely get a chance at redemption,' Gaethje said following his win. 'We take a loss, we just have to go home and sit with it and it eats us away and we usually never get that chance. 

'So to come back, to prove myself and I believed in myself the whole time I told Dustin he's my favourite fighter on Earth. Luck and chance are a factor in this cage and I just thank god I came out on the right side this time.

'If you watch that [first] fight compared to this fight, it's night and day. It was a tough lesson to learn but that man taught me that lesson and I think God for him.'

Gaethje then went on to add: 'You know what I want to do next. I want to fight for the world championship. These guys are fighting in October. I’m going to prove I’m the best in the world.'

The American feels as though he's been around forever and has so much experience for a 34-year-old. 

But he is still fiercely driven to summit his division having fallen short against Khabib Nurmagomedov and Charles Oliveira in previous shots at the gold. 

Perhaps he has refined the edges of his game that needed to be smoothed over, showing in this blistering finish and the decision win over Rafael Fiziez in London earlier this year, that he is now ready to take the final step. 

In the co-main event, Alex Pereira overcame some early adversity to overcome Jan Blachowicz on the scorecards. 

The Brazilian was making his light-heavyweight debut against the former champion and found himself battling to survive in the opening round. 

Blachowicz managed to secure a takedown and wrap himself around the back, threatening to lock in a rear-naked choke that was ultimately well defended. 

'Poatan' took over in the second, landing heavy shots against his opponent, who looked to be weary at the altitude. The final five minutes followed a similar pattern and despite a late takedown for the Pole, it was Pereira who was given the nod by split decision.  

Elsewhere on the main card, Derrick Lewis delivered an incredible KO, sprinting out of the traps with a flying knee before following up with ground and pound. 

He then thrilled the crowd by taking his shorts off in the octagon and dancing. 'I thought I'd just throw some bulls**t, I've been wanting to hit people for two years,' he reflected. 

'I didn't plan on taking my shorts off but you know, my d*** has a mind of it's own! I'm a free agent now so hopefully I can get a new contract with the UFC, if not, it is what it is.' 

Tony Ferguson suffered a submission defeat by Bobby Green, meaning El Cucuy has now lost six fights in succession and his future with the UFC is seriously in question. 

And in the curtain-raiser, Kevin Holland impressed with a submission victory over Michael Chiesa midway through the opening round of their welterweight clash.