With one win, one loss, and one washed-out match, New Zealand are tottering at fifth place on the points table. They are coming off a narrow five-wicket loss to Australia, which went down to the penultimate over, but will take heart from the resistance offered by their bowlers in that match. They will also take heart from the form of their opponents - West Indies, finalists in 2013, have yet to win a match and come into this game having been dismissed for 48 against South Africa, their second-lowest total in ODIs.
A loss for New Zealand would dent their chances of a straightforward entry into the semi-final, while a defeat for West Indies would further hurt their net run-rate, which is already down in the negative.
West Indies captain Stafanie Taylor has stressed that "panic is not in our books", but has also acknowledged it was "down to business time" for her side, with the threat of falling out of contention for a semi-final berth. "All the teams are in the business mood; we, too, do need to get into the business mood. It's all about belief, going out there and getting the job done," she said.
No West Indies batsman has made a half-century in the tournament so far and they would look to heed the advice of coach Vasbert Drakes, who emphasised the importance of clarity: "I want the players to be clear in what they want to do, be clear in their decision making, be clear in their thinking."
Their chances of a turnaround will depend heavily on former captain and wicketkeeper Merissa Aguilleira finding form in her 100th ODI appearance, after scores of 1, 6 and 3 so far. Allrounder Deandra Dottin, who followed her 20-ball 29 against Australia with scores of 7 and 0, will also look to summon her might with the bat and deliver breakthroughs with her medium-pace.
A cloud cover is likely to loom over County Ground for a major part of the day, which could assist the medium-pacers early. However, considering spinners have bagged 21 wickets as opposed to the 10 by the seamers in the three matches played so far at the venue, it's unlikely New Zealand would risk tweaking with their four-spinner attack, led by the offspin-legspin pair of Anna Peterson and Amelia Kerr.
New Zealand allrounder Amy Satterthwaite, who had returns of 6 for 17 - the best T20I bowling figures - with her medium-pace at this ground in 2007, could also find purchase with her offspin should the match be played on a used pitch. In assessing the challenges West Indies may pose, Satterthwaite echoed coach Haidee Tiffen, underlining the need for her side to guard against the mercurial nature of the opposition. "They are a dangerous side and a quality side as well and must be hurting with their start and we know that they'll come back strong. They showed that in the way they won the World T20 title last year, so they know how to win games," Satterthwaite said.
West Indies' resources in the bowling department are limited. Having lost their fast-bowling strike bowlers Shakera Selman and Shamilia Connell to injuries, their effectiveness revolves largely around Taylor's offbreaks - she is the side's leading wicket-taker in the tournament, with three dismissals. West Indies will look to left-arm spinner Shanel Daley and offspinner Afy Fletcher to back Taylor up in their pursuit of their first win on the tour so far.

Annesha Ghosh is a sub-editor at ESPNcricinfo