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Jeffrey D. Allred, Deseret News
Brigham Young Cougars head coach Dave Rose shots instruction during action in the West Coast Conference quarterfinals in Las Vegas Friday, March 2, 2012.

LAS VEGAS — BYU finds itself in a battle against University of San Diego in the quarterfinals of the West Coast Conference Tournament at the Orleans Arena.

The Cougars and Toreros are tied, 34-34, at halftime.

Brock Zylstra started for BYU in place of an injured Noah Hartsock, and the move paid immediate dividends, as he scored the Cougars' first seven points. He has 10 at the break.

BYU, which took an early 11-4 lead, has never trailed. A 6-0 run by the Toreros tied the game at 24-24, but the Cougars responded with a 7-0 run of their own. San Diego tied the game again, 34-34, with one minute left.

Hartsock entered the game at the 15:02 mark to rousing cheers of BYU fans. He has four points at intermission.

Matt Carlino, Brandon Davies and Charles Abouo have two fouls apiece.