Ameryst Alston scored 33 points and Cait Craft added 24 as No. 8 seed Ohio State stunned top-seeded and No. 11-ranked Penn State, 99-82, Friday in the Big Ten Conference tournament quarterfinals.
The Buckeyes (17-17) advance to a semifinal today against Iowa at Bankers Life Fieldhouse in Indianapolis.
Raven Ferguson added 15 points for Ohio State, which shot 71.9 percent in the first half when it made all 10 of its 3-pointers for a 58-34 lead. The 58 points were a tournament record.
The Lady Lions (22-7) were led by Ariel Edwards' career-high 29 points plus 10 rebounds. Conference player of the year Maggie Lucas added 21 points, including a couple of 3-pointers that gave her the Big Ten's career record with 358.
Ohio State built its lead to 27 points before Penn State cut it to nine with 2:56 left. Ohio State then went on an 11-2 run to seal the outcome.
Ohio State's previous win against a top-15 team came against Michigan State in the 2011 conference tournament.
Alston connected on 5 of 6 3-pointers for the Buckeyes and Craft, the younger sister of the point guard for the Ohio State men, Aaron Craft, made 4 of 7 from long range. The duo also combined for 15 assists.
Big Ten defensive player of the year Dara Taylor added 14 points and eight assists for the Lady Lions, who now wait for the NCAA tournament.
■ Iowa 87, Purdue 80: Ally Disterhoft scored 10 of her 12 points in the final 5:38 as No. 23 Iowa (25-7) clawed back from the brink with a 24-11 closing run to upend 17th-ranked Purdue (21-8). Iowa's all-Big Ten selections Disterhoft, Samantha Logic and Bethany Doolittle were held to a combined seven points in the first half because of foul trouble, but caught fire in the second. Doolittle finished with 16 and Logic 12. Courtney Moses led Purdue with 24 points.
■ Michigan State 61, Michigan 58: Annalise Pickrel scored 18 points and Branndais Agee was clutch down the stretch as No. 19 Michigan State rallied to beat Michigan (18-13). The second-seeded Spartans (22-8) trailed for all but a brief time early in the second until scoring the final six points of the game.
■ Nebraska 80, Minnesota 67: Jordan Hooper scored 33 points with 12 rebounds, Rachel Theriot added 14 points and 18 assists and 16th-ranked Nebraska (23-6) beat Minnesota (20-12).