Updated

Oklahoma blew an 11-point second half lead before sending rival Texas to its worst start in the Big 12 with a 71-67 overtime win Sunday.

Danielle Robinson overcame a bad shooting start to 30 points, including five in the overtime, for the No. 15 Sooners (13-3, 3-0 Big 12). Kathleen Nash scored 20 for the Longhorns (11-6, 0-3), who have two overtime defeats and a loss to No. 1 Baylor in a three-game skid.

Aaryn Ellenberg scored 16 for Oklahoma. Her 3-pointer to start overtime sparked a 7-0 Oklahoma run. Texas twice got within three points but Ashleigh Fontenette missed two 3-pointers in the final 11 seconds and Robinson made one free throw with 1.5 seconds to play to close it out.

The Sooners have won four in a row in Austin.

Statistically, nothing would have suggested Oklahoma would win this one. The Sooners shot just 31 percent, went 3 of 21 on 3-pointers and were outrebounded 56-45. But they also forced 23 Texas turnovers, went 20 of 25 from the free throw and kept going to Robinson who eventually shook off a bad start to carry her team.

Robinson missed 13 of her first 16 shots with a couple of blown layups but eventually shot her way out of the slump. She also made 8 of 10 free throws.

Texas had none of their turnovers in the final 10 minutes of regulation as the Longhorns rallied from a 49-38 deficit. Chassidy Fussell, who scored 10 points in the final six minutes of regulation, forced overtime with her tough layup with 27 seconds left that tied it at 59-59.

The Sooners had to play overtime without centers Joanna McFarland and Jelena Cerina, who both fouled out. Oklahoma opened the extra period with Ellenberg's 3-pointer. Whitney Hand and Robinson made four free throws to quickly push Oklahoma to a 66-59 lead.

Texas got back within three on Fussell's jumper before Oklahoma's Carlee Roethlisberger got an easy put-back layup and Robinson followed it with a floating jumper to make it 70-63.

The Longhorns are off to another rough start in the fourth year under coach Gail Goestenkors. Texas had never been 0-3 in conference play, even dating back to the old Southwest Conference.