Former Chiefs and All Black centre Sonny Bill Williams has made himself unavailable for the New Zealand rugby league team to defend its World Cup title in Britain next month.
The Sydney Roosters second rower is known to be considering a return to Super Rugby but was understood to be holding on for the opportunity to become a world cup winner in rugby league and Rugby Union.
New Zealand are the current Rugby League world cup holders as well as the Rugby Union world cup winners so his decision to forfeited the chance to become a World Cup winner in both rugby codes has fueled speculation that he may be on his way back to Rugby Union and Super Rugby.
Williams was a member of the All Blacks team that won the Rugby World Cup in 2011 also won a Super Rugby title in 2012 with the Chiefs before switching codes and winning Australia's National Rugby League last weekend with the Roosters.
Williams is yet to reveal whether he will remain in rugby league or return to rugby union but if he does return to rugby he has said that he would play for the Chiefs again.