OJAI, Calif. - Alexander Cornelissen advanced to the final eight of the top level Championship Singles bracket at the Pac-10 Championships on Thursday at Libbey Park. Cornelissen defeated Washington's Derek Drabble 6-3, 6-3 and then, after a pair of rain delays, upset No. 5 seeded Amit Inbar of UCLA in straight sets as well, 6-1, 6-4. The Lauwe, Belgium native will play top-seeded and No. 8 ranked Robert Farah of USC tomorrow at noon.

Also in the Championship Singles bracket for the Ducks was Ric Mortera, Jose' Izquierdo and Nico Bjerke. Mortera fell 6-1, 6-3 to Stanford's Ryan Thacher, Izquierdo lost 6-1, 6-1 to UCLA's Matt Brooklyn and Bjerke dropped a 6-2, 6-1 decision to Stanford's Bradley Klahn, the defending Pac-10 Champion.

In the second level Invitational Singles bracket, Oregon was represented by Doug Mayeda, Aaron Clissold, Mitch Somach, Sho Higuchi and Duncan MacDonald-Korth. Mayeda lost 6-1, 6-3 in the first round to UCLA's Jeff Gast while MacDonald-Korth won his opening round match in comeback fashion, 5-7, 6-0, 6-1 over Arizona's Frank Chen. Higuchi also won, 6-7(2), 6-2, 6-4. Clissold and Somach had  first-round byes.

In the second round, Clissold was victorious 7-6, 7-5 against USC's Joel Giger while MacDonald-Korth fell 6-2, 6-3 to UCLA's Alex Brigham, Higuchi dropped a 7-6, 6-4 match to Washington's Brad Bator and Somach lost 6-0, 6-4 to Stanford's Matt Kandath.

Doubles competition begins tomorrow while Clissold and Cornelissen continue singles play.

CHAMPIONSHIP SINGLES

First Round:

Alex Cornelissen (ORE) def. Derek Drabble (WASH), 6-3, 6-3

Ryan Thacher (STAN) def. Rick Mortera (ORE), 6-1, 6-3

Matt Brooklyn (UCLA) def. Jose Izquierdo (ORE), 6-1, 6-1

Bradley Klahn (STAN) def. Nico Bjerke (ORE), 6-2, 6-1

Second Round:

Alex Cornelissen (ORE) def. Amit Inbar (UCLA), 6-1, 6-4

INVITATIONAL SINGLES

First Round:

Jeff Gast (UCLA) def. Doug Mayeda (ORE), 6-1, 6-3

Duncan MacDonald-Korth (ORE) def. Frank Chen (ARIZ), 5-7, 6-0, 6-1

Sho Higuchi (ORE) def. Ben Lankenau (USC), 6-7(2), 6-2, 6-4

Mitch Somach, Aaron Clissold first round byes

Second Round:

Aaron Clissold (ORE) def. Joel Giger (USC), 7-6, 7-5

Alex Brigham (UCLA) def. Duncan MacDonald-Korth (ORE), 6-2, 6-3

Brad Bator (WASH) def. Sho Higuchi (ORE), 7-6, 6-4

Matt Kandath (STAN) def. Mitch Somach (ORE), 6-0, 6-4