Danielle Robinson scored 19 points and Carlee Roethlisberger added 18 to lead No. 21 Oklahoma to a 71-69 victory over Texas Tech in the Big 12 tournament on Wednesday night.
The Sooners (21-10) advanced to face Texas A&M in Friday's semifinals.
Casey Morris hit a 3-pointer to pull the Lady Raiders (22-10) within two with 47.4 seconds left. Oklahoma could have sealed the game when Aaryn Ellenberg came up with a steal, but she missed an open layup.
Texas Tech called timeout with 9 seconds left and put the ball in Chynna Brown's hands for a drive, but she lost the ball on her way to the basket and Oklahoma held on.
Monique Smalls led the Lady Raiders with 15 points.