All Blacks star Sonny Bill Williams announced Tuesday he will re-enter the boxing ring next year to fight for the New Zealand heavyweight title. Williams, who has a clause in his New Zealand Rugby Union contract allowing him to pursue his boxing career, will fight Aucklander Richard Tutaki in Hamilton on February 8. The 26-year-old former rugby league player, part of the All Blacks side that won the Rugby World Cup in October, has won all four of his professional boxing matches so far, two by knockout. His latest bout will take place just weeks before Williams makes his Super Rugby debut for the Waikato Chiefs, after switching from the Canterbury Crusaders in the off-season. Tutaki, 33, has a record of 19 wins, 21 loses and one draw.