The seventh and possibly series-clinching race of the America's Cup was postponed Sunday because of light winds, and will be held Tuesday instead.

Alinghi, from landlocked Switzerland, leads the challengers from New Zealand 4-2 in the best-of-nine series, which has been the closest contest in 24 years.

The seventh race was pushed to the next scheduled race day, Tuesday, to the disappointment of an enormous spectator fleet and the nearly 100,000 people who had passed through the turnstiles of Port America's Cup.

The Swiss had the momentum going into the seventh race.

Brad Butterworth, the skipper looking to clinch his fourth consecutive Auld Mug awarded to the America's Cup winner, had guided SUI-100 to three straight wins, including back-to-back comeback wins over the Kiwis.

But afternoon clouds didn't help the already soft breeze as both boats sat in the light swell, the sailors munching on sandwiches and patiently waiting until race officials called it a day.

It was a scene reminiscent of the last America's Cup in 2003, when erratic weather in the Hauraki Gulf off Auckland, New Zealand, meant Alinghi had to wait an extra day to complete its 5-0 sweep of Team New Zealand.

The landlocked Alpine nation then chose Valencia as the host for the 32nd edition because of its consistent weather.

The current edition of the event has had few weather postponements, aside from a long delay to start the Louis Vuitton Cup challengers series in April with nearly eight days of sailing lost.