Sonny Bill Williams surprised himself as well as those who questioned his ability to switch from league to union with his display on the wing in last weekend 's quarterfinal against Argentina .
Sonny Bill Williams is the pin - up boy of New Zealand rugby .
Sonny Bill Williams , the pin - up boy of New Zealand rugby , surprised himself as well as those who questioned his ability to switch from league to union with his display on the wing in last weekend 's quarterfinal against Argentina .