For this edition of Knockout of the Week, we go back to June 2017 and Derek Brunson's brutal KO of Dan Kelly. Brunson will attempt to do it again this Saturday in Charlotte when he faces Jacare Souza, live and free on FOX.

Watch as some of the fighters from Fight Night Sydney face-off from Media Day in Sydney, Australia.

Watch Derek Brunson discuss his first round KO against Daniel Kelly in the Octagon at UFC Fight Night Auckland.

Preview the Fight Night Auckland middleweight bout between Derek Brunson and Daniel Kelly.

The Fight Network's Robin Black joins UFC.com's Matt Parrino in Las Vegas to preview the stacked main card for UFC 209 on Pay Per View Saturday night. The two break down Tyron Woodley vs. Stephen Thompson, Khabib Nurmagomedov vs. Tony Ferguson and more.

Watch the faceoffs from UFC 209 media day in Las Vegas, featuring main event stars Tyron Woodley and Stephen Thompson, co-main event fighters Khabib Nurmagomedov and Tony Ferguson, and many more.

UFC Minute host Lisa Foiles previews some of the best under-the-radar fights to look out for at UFC 209.

Watch Daniel Kelly backstage after his win over Chris Camozzi at Fight Night Melbourne.

Watch the stars of Fight Night Melbourne face-off during media day, featuring main event fighters Robert Whittaker and Derek Brunson.