Team New Zealand has lost the lead in the America's Cup World Series after finishing fourth at the latest stop in Portsmouth.

Britain's Ben Ainslie won the event by a point from Oracle to lead his BAR team to the top of the standings with Team New Zealand now third behind Oracle.

Skipper Glenn Ashby is still pleased with the performance with a rejigged crew.

He says it's been a fantastic effort with basically a whole new crew and four guys out of position.

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Asby says it was a tough days racing and they were up against some polished teams.

Peter Burling and Blair Tuke were among those not competing with their focus on the Olympics.

Ashby believes giving their guys some exposure to this type of racing stands them in good stead for the Cup regatta itself.