Team New Zealand capsized during the run-in to the second race of their America's Cup challenger semi-finals against Britain's Land Rover BAR in Bermuda, with all crew members later reported safe.
After winning the first race against Ben Ainslie's syndicate on Wednesday to move 3-0 ahead in the first-to-five contest, the New Zealanders were heading towards the start line under strong winds when the boat rose up on its foils and plunged forwards into the water.
Race organisers confirmed all of the crew were "accounted for and unhurt" as Team New Zealand were left to assess the damage to the catamaran, which could yet scupper hopes of continuing in the event.
Ainslie said in a statement on BAR's official Twitter feed: "In 30 years of racing, it is the most full on, exhilarating sailing I have ever had.
"The most important thing is that everyone is okay on Emirates Team New Zealand after their capsize.
"We look forward to seeing them back on the race course."
BAR were awarded the win as a result of the incident, which now sees them trail 3-1.
The winners are set to progresses to the challenger final and whoever wins that takes on defending champions Team USA for the America's Cup itself.