"We said before that this game was about getting a benchmark in the build up to the Olympics. Finding out where we could hurt the best teams and what things we need to work on and I don't think we could've asked for a game that gave us more.
"Being one nil up after 88 minutes shows we can compete against these teams but we found it hard to hold on in that last ten minutes and that's a very valuable lesson."
"We've taken a huge step today. It was a good performance in front a sell out crowd but the key now is to keep putting in that level of performance, no matter who we play. The more we can do that between now and the Olympics the better space we'll be in for London."
Hannah Wilkinson had fired New Zealand into an unlikely 49th minute lead against the triple Olympic gold medallists and two time World Cup winners when she capitalised on a Kelly O'Hara backpass and lofted goalkeeper Nicole Barnhart.
It was meant to be a baptism of fire for Readings in his first match as head coach and the smart money would have been on the USA to continue the form that saw them breeze through Olympic qualification with a combined goals tally of 38-0 in their five game campaign.
Indeed, New Zealand were under immense pressure for much of the first half with the pace of Alex Morgan the Ferns main cause for concern.
Ali Riley, who shone out in a solid team defensive effort was forced to bring Morgan down for a penalty after just nine minutes but Abby Wambach's spot kick hit the post.
In the counter attack that followed, Wilkinson reciprocated the let-off by firing over when one-on-one with American keeper Hope Solo.
But Wilkinson's well-taken goal in the second half, and positive substitutions from Readings, spurred the Ferns to their best passage of the game forcing the home side into nervous mistakes.
But just as it looked like New Zealand could close the match out and become the first team to beat the US on their turf since 2004, Morgan's double prompted a collective sigh of relief from the crowd of 20,667.
The Football Ferns' next matches are at the Cyprus Cup beginning February 28.
They meet Northern Ireland, South Africa and South Korea at the 12 nation tournament before the last stage of Olympic qualifying sees them face an as yet undetermined Oceania nation home and away in March and April for the final berth in London.