Oracle carried a one-point advantage into the series after taking out the round-robin phase of the competition earlier this month.
"We know we're in for a really long battle over the next week or so, but the fact that we're actually in the mix and in the game - the fact we've made it through this far, I think everyone will be pleased we managed to get off on the right foot today."
While the scoreboard will show two comfortable wins to Team NZ - 30 seconds and 1 minute, 28 seconds - the light, puffy conditions on the Great Sound ensured the Kiwi syndicate were anything but comfortable during the racing.
Ashby believed his team's strong starts - an area helmsman Peter Burling has previously been maligned for - were key today.
Oracle skipper Jimmy Spithill, who has previously criticised Burling for his "rookie fouls" in the startbox, was pushed over the startline early in the opening race, immediately handing Team NZ a two boat-length head start. In the second race the two boats were fairly even off the startline, but Team NZ had the acceleration to roll Oracle down the first reach.
"The starting today gave us the opportunity to sail our own race a little bit more, after getting off the line really well," said Ashby.