If America's Cup challengers gained any confidence from the recent America's Cup World series t may have taken a blow with reports of the speeds holders Emirates Team New Zealand are reaching in the Waitemata Habour.
According to French publication Paris Match, Team New Zealand reached the magical mark of 56 knots (103.7 km/h) during a training session.
The report comes from Frenchman Guillaume Verdier, who has previously been part of the Team New Zealand design team.
To reach that sort of speed it's expected Team New Zealand's Te Rehutai would have been sailing in strong winds.
According to the America's Cup website, Team New Zealand did reach up to 47.14 knots on the opening day of America's Cup World Series earlier this month.