The opening pair of Colin Munro and Martin Guptill have failed in every game since the Black Caps' tournament opener against Sri Lanka, leaving Williamson to repeatedly walk out to bat early in the innings to attempt to halt any further dangerous inroads.
Ross Taylor has had three strong contributions to go with two early exits, but Tom Latham is going through a significant slump with the bat, often leaving Williamson having to receive assistance from the middle-order, and having to bat conservatively to build a competitive total.
Conservative won't cut it against Australia, who are top of the tournament, having won their last four games. Whether it be Munro or potential replacement opener Henry Nicholls supporting Guptill at the top of the order, a solid opening platform is necessary for the Black Caps to be able to play the style of cricket they want.
Then, a mixture of Taylor, Latham and the middle-order will need to provide runs as well, if Williamson and the Black Caps are to have any chance of repeating those magical scenes from 2015.