SONNY BILL WILLIAMS was stunned by a brutal knockout from his 48-year-old opponent in a major upset.
The former New Zealand rugby star, 37, took on MMA legend Mark Hunt in Sydney on Saturday night.
But things did not go to plan for the 6ft 4ins Aucklander.
Midway through the fourth round of the eight-round heavyweight bout, tubby Hunt went on the attack.
Williams could do nothing to stop the barrage of heavy blows.
And he was left down on his knees as the referee waved it off.
That in turn ripped away his unbeaten professional boxing record after nine straight wins.
Williams started his pro boxing career way back in 2009 with the aim of using the combat sport to improve him as a rugby player.
But since retiring from rugby in early 2021, he has focused fully on the ring.
Williams beat Waikato Falefehi by a unanimous decision last year and then flattened former Aussie Rules ace Barry Hall twice in his first-round KO win in March.
Many expected him to maintain his winning streak against Hunt.
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