(Video) Holly Holm knocks out Ronda Rousey with a brutal head-kick at UFC 193!

Former Boxing champion Holly Holm caused a sensational upset after she knocked out MMA superstar Ronda Rousey with a brutal head kick in the second round at UFC 193 in Melbourne, Australia.

This was Rousey’s only loss of her mixed-martial arts career. Watch the moment below!

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