Luna Rossa is vowing to come out fighting to keep its America's Cup dream alive

The Italians have gone 5-3 down in the best of 13 race battle with Team New Zealand for the Auld Mug.

After being out paced in race seven, the Italians led by nearly four minutes in race eight as the defender fell off its foils.

But Luna Rossa fell off theirs approaching the bottom mark and couldn't recover.

Co-helmsman Jimmy Spithill says it's frustrating but they will keep on going.