Emirates Team New Zealand beat Oracle Team USA in race two of the America's Cup final on Saturday to go 1-0 ahead after erasing the US team's one-point lead in the first race with another convincing win.
In the first race, Spithill was over the starting line early, forcing him to drop two boat lengths behind to clear the penalty.
But the Kiwis later came off their foils during a hard maneuver and slowed dramatically in light, shifty wind, losing half their lead.
The Kiwis started the 35th edition of the America's Cup with a negative point after Team USA won the previous qualifiers. "We've got five days now, very important days". They've also made the right choices on which foils to use on the ends of their daggerboards.
The defenders appear to be in serious trouble as they suffered two more heavy defeats to the Kiwis to fall behind 3-0 in the first-to-seven series.
Cycling nerd John MacLeary wants to know whether the cyclors on board the New Zealand boat wear trainers or cycling shoes. "We know if we stand still these guys will be catching us", he said.More news: PS4 Pro Competes With Xbox One S, Not Xbox One X
While it is not over until it is over, as the Kiwis will surely testify having surrendered an 8-1 lead to Oracle in San Francisco in 2013, the past two days will have been deeply concerning for Spithill and his crew.
Burling, an America's Cup rookie who has won Olympic gold and silver medals with grinder Blair Tuke, steered the Kiwis to victories of 49 seconds and 1 minute, 12 seconds on the turquoise waters of the Great Sound.
The always-innovative Kiwis are using a cyclor grinding system.
From 8-1 down and facing match point, Larry Ellison's defending champions won eight races in a row to triumph 9-8.
As for Oracle's foil selection, "I thought we made a good step forward", Spithill said.
"You like to sort of keep going while you're on a bit of a roll, but the schedule is the schedule and we've known that for a long time - we understand while they have chosen to hold it over the weekends", said Ashby.
The Kiwis were simply imperious, once again dominating in the start box before opening unassailable leads over an impotent-looking Oracle, who have lost every leg of the Match so far.