Team New Zealand have beaten America's Cup defenders Alinghi 2-0 in a secret hitout in Valencia.

It is understood Emirates Team New Zealand and Alinghi sailed two full-length practice races on Friday.

The website Sailing Anarchy reported that Team New Zealand won after trailing Alinghi over the start line both times. In the first race Alinghi led at the top mark by 20s but were overtaken by Team New Zealand on the downwind run. Team New Zealand extended their lead up the second beat and won by 45s.

In the second race Team New Zealand got ahead on the first beat and won comfortably.

Neither of the syndicates would discuss the race or the results.