Team New Zealand have had a disastrous day on the water, capsizing and being beaten in two starts by the battling British team.
TNZ's victory before an America's Cup arbitration panel won them the right to line up against the three challengers in two days of practice racing this week.
But a horror show on the first day confirmed the defenders, under skipper Peter Burling, have plenty to work on.
The America's Cup holders capsized as they were leading Ineos Team UK at the bottom mark. They were sailing at around 35 knots when their bow went into the water.