The main event at UFC Fight Night in Phoenix, Arizona produced a quickfire finish as the combination of a Francis Ngannou uppercut and a collapsed knee saw Cain Velasquez stopped in just 26 seconds of the night's main event bout.

Axar.az reports citing RT.

The action had barely started at the Talking Stick Arena in Phoenix as former title challenger Ngannou and former two-time heavyweight champion Velasquez kicked off their main event bout.

And when the pair locked up close to the fence, a right hand from Ngannou stunned and dropped Velasquez, whose right knee collapsed as he fell to the canvas in obvious pain.

It brought the highly-anticipated bout to an abrupt end as the fans booed their disappointment at the event's conclusion.

"I promise you guys, I'm back," said Ngannou after the fight.

"And you're going to see me around again. I told you yesterday I had a surprise for you. I hope you like it."

Ngannou admitted he wasn't entirely sure what had transpired until he saw the replays on the big screen

"He was very fast, so I didn't even realise what happened," he admitted.

WOW!@Francis_Ngannou gets it done in Arizona! #UFCPhoenix pic.twitter.com/xGF4ziuAZA

— UFC (@ufc) February 18, 2019