Mike Singletary had 24 points and 10 rebounds to lead Texas Tech over Oklahoma 75-65 on Saturday night.
The Red Raiders (14-5, 2-3 Big 12) pulled ahead in the final three minutes, closing the game on a 10-1 run.
Tommy Mason-Griffin scored 26 points to lead the Sooners (11-8, 2-3).
Trailing by 11 early in the second half, Texas Tech used a 12-0 run - highlighted by a 3-pointer by John Roberson and back-to-back shots beyond the arc by Singletary - to lead 35-34 with about 16 minutes remaining.
The Red Raiders led by four points twice afterward, but Mason-Griffin kept the Sooners close. He hit consecutive 3-pointers to tie it at 62-62.
Singletary had his fourth double-double of the season.