5 best flying knee KOs in UFC history

#4. Edson Barboza vs. Beneil Dariush

Back in 2016, Edson Barboza was on his way up the ranks in the UFC lightweight division. Following back-to-back unanimous decision victories over Anthony Pettis and Gilbert Melendez, Barboza was eyeing his third win on the bounce going into his bout against Beneil Dariush at UFC Fight Night 106.

Both fighters' routes to victory were fairly obvious. Most were of the opinion that Dariush will have to take the fight down to the mat and look for submissions, with Barboza likely looking for a knockout on the feet.

Surprisingly, Dariush opted to stand and bang with the lethal Brazilian striker. He walked Barboza down for as long as the fight lasted, allowing 'Junior' to pick his moment to unleash a powerful strike with his opponent coming in.

Three-and-a-half minutes into the second round, Barboza uncorked a perfectly timed flying knee to put Dariush to sleep.

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#3. Yoel Romero vs. Chris Weidman

On the main card of UFC 205, one of the biggest pay-per-views in the history of MMA, two top-ranked middleweight contenders locked horns with a potential title shot on the line.

Chris Weidman, the former champion, was looking to return to winning ways after suffering the first loss of his pro career against Luke Rockhold in his last outing. The American took on Cuban powerhouse and former Olympian Yoel Romero, with both fighters eyeing a shot at Michael Bisping's middleweight strap.

The first two rounds were very competitive, with both fighters enjoying success at various points in the opening 10 minutes. Weidman was primarily looking for takedowns, but Romero was stuffing all of the American's attempts. Meanwhile, 'The Soldier of God' was being patient and waiting for the right moment to explode.

24 seconds into the third round, Weidman shot in for another takedown. His jaw was met with a powerful flying knee, which knocked him out cold. Romero landed a few follow-up shots before the referee stepped in.