Anderson Silva's lightning-quick front kick to the jaw of Vitor Belfort ended their much-anticipated middleweight title bout in a stunning first-round knockout.

The main event of UFC 126 at the Mandalay Bay Events Center in Las Vegas, NV between Anderson Silva and Vitor Belfort started out a little slow with Belfort getting a few kicks in during the first 2 and half minutes.

But after a few exchanges, the fight got going and at 4:25 of the first round, Belfort found himself laying on the ground after a great front kick from Silva. After two punches to the face, it was all over as Silva retained his UFC Middleweight Championship with a knock out win over Belfort.

Here’s the video of the knock out as well as the postfight interviews:

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Photo credit: Ric Fogel for ESPN.com