For four years Team New Zealand has been a fortress, most of its operation off-limits to media as it prepares to defend the America's Cup.
Now, for the first time, SUNDAY has been invited inside for an exclusive behind the scenes look at what it will take to win in 2021. We talk controversies, spying and high speed sailing.
Reporter: Rebecca Wright
Producer: Stephen Butler
Cameras: Gary Hopper, Will Green
Editor: Ben Selkirk