DALLAS -- Oklahoma faced a 19-point halftime deficit for the second straight day, but could not repeat Saturday's miracle finish as Iowa State beat the Sooners 79-60 in Sunday's Big 12 Tournament semifinal game at the American Airlines Center.
Center Anna Prins scored a career-high 32 points to lead Iowa State. Forwards Chelsea Poppens and Hallie Christofferson added 14 and 10, respectively, as the Cyclones scored 42 points in the paint.
"They have a front line that annihilated us," OU head coach Sherri Coale said. "(They scored) 56 points from their front line.
"They're a really, really good basketball team and deserved to win that game."
Oklahoma made four of its first five field goals and led 10-7. Then, the Sooners missed 11 straight shots and the Cyclones used the opportunity to go on a 17-0 scoring run.
Oklahoma trailed 41-22 at halftime,
its second straight day behind 19 points at intermission. However, the Sooners could not muster the magic that allowed them to rally from a tournament-record 22-point deficit as they did in Saturday's 65-64 quarterfinal win against West Virginia.
"We didn't challenge (Iowa State) they way that we should have, " Coale said. "We started off OK, I thought, hit a few shots. Then we just went bone dry, just like last night.
"That's really, really hard to summon that emotion to get back up that hill again. You need baskets to get some energy, some life, and we couldn't get a ball to roll in."
Joanna McFarland and Morgan Hook each had 12 points to lead the Sooners, who shot 36 percent from the field and 29 percent from 3-point range.
McFarland, who averaged 10.0 boards as OU's leading rebounder, drew foul trouble early and played just 26 minutes. Iowa State outrebounded Oklahoma 49 to 28.
OU's leading scorer Aaryn Ellenberg, who was 3-of-16 from the field, was held scoreless in the second half after counting a team-high 11 first-half points.
Iowa State, the No. 2 seed, faces top-seeded Baylor Monday in the championship game.
Oklahoma was playing in its fifth straight Big 12 semifinal game, but suffered its third consecutive loss in the round.
"This quick turnaround, the great performance by Iowa State today, gave us yet another level of something to play through. When we get to the first and second rounds of the NCAA Tournament, we'll be better and harder for it."
Oklahoma will learn its seeding and preliminary round location for its 14th consecutive NCAA Tournament appearance Monday, March 18. The NCAA women's tournament bracket will be announced live at 6 p.m. Central on ESPN.
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