All Black Sonny Bill Williams hints at future in coaching

Sonny Bill Williams has dropped another hint about an eventual switch to coaching.

The All Blacks midfielder is targeting next year's Rugby World Cup, but his future beyond that is undecided. His contract with NZ Rugby expires at the end of next year's tournament in Japan.

On Tuesday, Williams was in Australia to attend a Sydney City Roosters function and told Seven News he was keeping his options open, one of which could be a return to his former NRL side as an assistant coach.

"I'm doing my coaching papers and a little bit of study as well, so who knows," said Williams. "The journey's just beginning."

The 33-year-old took some time to stop by a Roosters training session, where forward Jared Waerea-Hargreaves offered a vote of confidence for his former teammate.

"As a player, he's done it all," said the Kiwis prop. "He could do pretty much anything.

“I think he'd definitely be a good assistant."

On Sunday, Williams told Fox Sports' The Matty Johns Show that moving into a role where he could have a positive influence in the pacific community would be a priority, but he wouldn't rule out a third stint in rugby league in 2020.

"I really want to affect my Pasifika people,” said Williams. “With that comes responsibility.

“I have to keep the wife happy and then if I do play on, it'll have to be at a place where I can still have a voice."

Williams played two seasons for the Roosters, winning an NRL premiership in 2013.