Ngannou is on a three-fight winning streak and looks to cinch a second title shot, while Rozenstruik remains unbeaten after 10 bouts including four in the octagon.
Check out the UFC 249 live blog below.
Round 1: Dan Miragliotta is the third man in the cage for this heavyweight contest. NGANNOU SURGES FORWARD WITH MASSIVE HOOKS AND SLEEPS ROZENSTRUIK IN SECONDS WITH A MONSTER LEFT HOOK. MY GOODNESS THAT WAS VIOLENT.
On the replay Ngannou was not especially technical but it doesn’t matter when you swing hammers like that. Bigi Boi is the latest victim of MMA’s biggest puncher.
OFFICIAL DECISION: Francis Ngannou knocks outs Jairzinho Rozenstruik 20 seconds into the first round.