Ineos Team UK remained unbeaten in the Prada Cup Challengers Series, beating American Magic in their only race on day two.
Meanwhile, Luna Rossa took out the first race with the Americans struggling all day.
Read about all the action from day two of the Prada Cup with AUT's Sailing Professor Mark Orams below:
All you need to know ahead of day two of the Prada Cup:
After months of drama, controversy and preparation, racing for the America's Cup finally got under way on Friday with the start of the Prada Cup.
And what an opening day of racing it was - with British challenger Ineos Team UK stunning the field with back-to-back victories against American Magic and Luna Rossa, despite their well-documented struggles in the World Series just under a month earlier.
The team's sensational comeback reportedly took a sour turn, however, with Italy's Luna Rossa protesting the British boat over a design technicality.
Reports suggested Luna Rossa potested the Brits' outhaul penetrating the sail skin on their main fairing - a hole in their mainsail - that helps to control the shape of the mainsail. The change was one of several made by Sir Ben Ainslie's team after their disastrous showing in December and while the infringement is considered "minor", Ineos would still need to come up with a solution to fix the issue before their race today.
Race director Iain Murray is hopeful, but not entirely confident there will be a full programme in the Prada Cup on Saturday, however.
Though they will aim for a 3:15pm start, Murray said the most likely scenario was a delay to the beginning of the day's racing as they waited for the wind to build.
The wind prediction models used by the organisers showed there could be between 7 and 9 knots around 3pm on Saturday, but Murray said that looked unlikely given the conditions this morning.
It's hoped the breeze will build later in the afternoon, but racing will be in lighter air than Friday and the currents today are also unfavourable.
Murray has until 6pm to start a race.
If only one race is completed on Saturday, the organisers will shoehorn three races into Sunday's programme.
The minimum wind limit for the Prada Cup racing is 6.5 knots and that threshold has to be reached in a "five-minute window of consistent breeze" before the start.
Racing today will be on a hybrid course, a combination of courses C and D.
The first scheduled race today is between Luna Rossa and American Magic, with the New York based team backing up against Ineos Team UK in the second race.
Organised by the Challenger of Record, the Prada Cup Challenger Selection Series will be held in Auckland throughout January and February 2021 to determine which of Luna Rossa, Ineos Team UK and American Magic will take on the defenders Team New Zealand in the 36th America's Cup Match starting on March 6.
The Prada Cup will consist of four round robins of three races each, a seven-race semifinal and a 13-race final between the two leading teams. Each win gets one point.
The highest ranked Challenger at the end of the round robins will be automatically qualified for the Prada Cup final.
The remaining two teams will then race in a seven-race semifinal and the first team who gets four points will qualify for the Prada Cup final.
The Prada Cup final will then determine the Challenger to face Team New Zealand in the America's Cup Match and the winner of the newly minted Prada Cup trophy.
There will be two races per day with the race window between 3pm and 5pm, with the exception of the final where the race window will be between 4pm and 6pm.
First race:
Luna Rossa - $1.85
American Magic - $1.85
TAB odds – Prada Cup winner:
IneosTeam UK – $2.30
American Magic – $2.80
Luna Rossa - $3.20
The Herald will have live updates on nzherald.co.nz/sport while you can listen to live commentary on Gold AM and iHeartRadio.
America's Cup coverage is free-to-air on TVNZ. You can also stream the action live or on-demand on TVNZ.co.nz or on the America's Cup YouTube channel.
If you're in Auckland, you can also head down to the America's Cup Race Village at the Viaduct Marina, where there will be a stage and big screens to watch the action. The village operates from 10am to 8pm on race days and can be accessed through the main entrance at the beginning of Hobson Wharf.
There are also many options to view the action live around Auckland's waterfront. Here are the best spots to watch the action.
Race officials will determine which course will be used on each racing day.
Professor Mark Orams is a former NZ and world champion sailor, Team New Zealand member, author, environmentalist and Professor of Sport and Recreation at the Auckland University of Technology.
Heading into the Cup racing?
• Give yourself plenty of time and think about catching a ferry, train or bus to watch the Cup.
• Make sure your AT HOP card is in your pocket. It's the best way to ride.
• Don't forget to scan QR codes with the NZ COVID Tracer app when on public transport and entering the America's Cup Village.
• For more ways to enjoy race day, visit at.govt.nz/americascup.
Logic says Auckland has about as much chance as a tissue paper mainsail.