New Zealand's Marina Erakovic has won her sixth career doubles title after taking out the US$740,000 WTA event at Stanford, California with partner Heather Watson.

Erakovic and Watson defeated the American and Australian combination of Vania King and Jarmila Gajdosova 7-5, 7-6 for the title.

The win caps off a fine debut pairing for the New Zealander and the Brit.

It is the Erakovic's first doubles title of 2012 after last winning a tournament in October last year.


Meanwhile in the singles final Serena Williams overcame a shaky start and two service breaks to beat lucky loser Coco Vandeweghe 7-5, 6-3 for her second straight Bank of the West Classic title.

Eight days after winning Wimbledon, Williams saved a set point and won the final four games of the opening set. It was the 43rd WTA Tour championship of Williams' career, tying older sister Venus for the most among active players.