Boxing and NRL legend Sonny-Bill Williams reveals he may retire after shock loss to Mark Hunt

Three-code sports great Sonny-Bill Williams reveals he can hang up the gauntlet on a stunning career after a devastating, shocking loss to 48-year-old UFC veteran Mark Hunt.

‘SBW’ went down in the fourth round of his heavyweight fight against Kiwi compatriot Hunt, who used his raw power to technically take out the man many believed would go undefeated.

Sonny Bill-Williams puts his hand to his face after a shock loss to Mark Hunt on Saturday night – it was his first boxing loss of his career after 10 fights

Williams had the reins in the first three rounds, but it was his opponent who waved goodbye in the last and caught the retired rugby star by surprise.

Hunt, who weighed 157kg just a few weeks ago, stamped his name as the ‘Super Samoan’ by beating Williams in his last career fight.

Although he was 13 cm taller and 20 kg lighter than Hunt, Williams could not contain the strength of his opponents, who managed to get close and take two monster shots.

Sonny-Bill Williams makes his boxing debut against Gary Gurr in 2009 as a 24-year-old

The 37-year-old says he was ashamed of the result, which could mean an end to his time in the ring.

“At this stage, I’m not even sure I’ll fight again. That could be it for me too,” Williams said.

“I’m 37, I’ve always said that if I get a lot of punishment, that could be it.

If this is the end of my sports career, it’s been a good one … what’s written for me is written for me.”

Hunt says he caught Williams with a strong uppercut to the right that would drop “everyone” given his heavyweight status.

Williams celebrates with Bulldogs fans after beating the Roosters in 2004 NRL Grand Final

‘Money Bill’ made his boxing debut in 2009 against Gary Gurr after a successful start to his NRL career.

In his first season, Williams won the NRL premiership in 2004 with the Bulldogs, alongside Johnathan Thurston, Willie Mason and Hazem El Masri.

The then 23-year-old made the controversial move to French rugby at club Toulon, who supposedly signed a $3 million two-year contract.

Williams storms through the Wallabies defense in a 2012 Bledisloe Cup match, where he was at the peak of his powers

From 2011-2013 Williams dazzled in Super Rugby, representing the Chiefs and Crusaders.

He made his All Blacks debut in 2010, which remains one of the best national rugby unions in history, with big names Dan Carter, Joe Rokocoko and Ma’a Nonu.

The slender utility company went on to win the 2011 and 2015 Rugby World Cups with New Zealand.

Williams holds up the NRL Telstra Premiership trophy and helps the Roosters secure the 2013 gong against the Sea Eagles

In a memorable switch, Williams returned to rugby league for a stellar cameo with the Sydney Roosters, taking them to a 2013 Grand Final victory.

His services were sought after around the world, where he ventured to Japan and Canada for mega coin deals.

He was the first player in rugby league history to join Adidas as a global ambassador and join an exclusive club that includes sports stars such as David Beckham and Lionel Messi.