Spain won two of the three classes at the Oceania Championships ©Drew Malcolm

The United States' Riley Gibbs and Anna Weis ended a windy final day as Nacra 17 winners at the Oceania Championships, while there was joy for Spain in the two other classes.

When British leaders John Gimson and Anna Burnet decided to sit out the last race off the Geelong coast in Australia, they left the door open for another team to win and the American duo duly obliged. 

They ended up winning the regatta by three points as Austrian pairing Barbara Matz and Thomas Zajac finished with the same score as Gimson and Burnet.

With Gimson and Burnet's place at the Tokyo 2020 Olympic Games already confirmed, they instead elected to focus on the World Championships, which are also being held in Geelong and racing begins on February 10.

Spain's Diego Botin and Iago López Marra topped the 49er class, having established an early lead at the four-day Oceania Championships and then built on it.

New Zealand's Peter Burling and Blair Tuke finished second and another team from New Zealand rounded out the podium - Logan Beck and Oscar Gunn.

It was a Spain-New Zealand one-two in the 49erFX class too.

Támara Echegoyen and Paula Barceló won four of 10 races to end with the biggest winning margin of all, bettering Molly Meech and Alexandra Maloney.

Aleksandra Melzacka and Kinga Loboda of Poland were third.