Williams defends shortened title bout

SYDNEY: Sonny Bill Williams has defended his controversial unanimous points heavyweight victory over veteran Frans Botha in a title bout that ended after 10 rounds in Brisbane on Friday night.

The fight, which was advertised and scheduled for 12 rounds as per WBA rules, was stopped early, drawing an angry reaction from Botha and boos from the crowd at the Brisbane Entertainment Centre.

The former World Cup-winning All Black star, in only his sixth professional fight, won the points on all three of the ringside judges' cards against the vastly experienced but ageing South African boxer.

Bookmakers refunded bets on Williams's controversial win and 44-year-old Botha has challenged the rugby star to a rematch.

Williams, who was on the receiving end of some heavy blows from Botha in the final round, tweeted on Saturday that both camps knew it was a 10-round affair. (AFP)