AUCKLAND, New Zealand -- Chris Dickson has made a big difference for Oracle of San Francisco.

The America's Cup challenger syndicate followed Switzerland's Team Alinghi into the semifinals Saturday, its 11th victory in a row with Dickson in charge.

Oracle beat OneWorld of Seattle by 33 seconds to complete a 4-0 triumph in their quarterfinal series. The defeat forced OneWorld to fight for a spot in the semifinals through best-of-seven race repechages.

Oracle had lost four of five matches in the first two rounds when team owner Larry Ellison recalled Dickson from a constricting shore job on Oct. 23, saying: ''It's his to win or lose from here on.''

Dickson, a New Zealander, has transformed the campaign and Oracle is unbeaten since his appointment.

Its quarterfinal victories over OneWorld -- after the teams traded 40-second triumphs in the first two rounds -- have been by 12, 17, 19 and 33 seconds, suggesting an increasing boatspeed advantage.

The top half of the quarterfinal draw -- for the top four ranked teams after two rounds -- has thrown OneWorld and Italy's Prada into repechages. Prada of Italy, which challenged Team New Zealand for the America's Cup two years ago, forfeited its final race of the quarterfinal with Alinghi on Friday night, giving Alinghi a 4-0 sweep.

Le Defi of France kept alive its quarterfinal series with Sweden's Victory Challenge when it came from behind Saturday to win by 34 seconds. New York's Stars & Stripes improved to 3-1 and match point in its series with the GBR Challenge, beating the British team for the third consecutive time, by 34 seconds.

Oracle led around five marks Saturday and has led OneWorld around all but one mark in three races. It built a 21-second lead after the first beat into a 37-second margin by the second, the race's midpoint.