Videos: Rugby player by day, undefeated boxer by night – Sonny Bill Williams is back

What will it be today, Sonny? Rugby League, boxing? Oh, an All Blacks comeback?

Imagine how good you have to be to arse about as much as Sonny Bill Williams does and still come back at the top of his game - in any game. Well, the New Zealander is back in training early with the Chiefs and he's targetting a return to the All Blacks ahead of this year's Rugby World Cup in England. But it isn't his only ambition in 2015. Oh no, he has a few other things to take care of first. https://www.youtube.com/watch?v=lZEP4J4HDrE First thing's first though and, on January 31, Williams will step back into the boxing ring where he currently boasts a record of 6-0. The heavyweight will take on Chauncy Welliver in a free-to-air TV event that has four other rugby players - including Quade Cooper - on the undercard. Williams has had pretty decent preparation too, sparring with Commonwealth gold medalist David Nyika who described the code-crosser as "class". https://www.youtube.com/watch?v=J18BzBt5GCU