DALLAS (AP) — Roshunda Johnson scored 20 points and Brittney Martin added 17 to lead fourth-seeded Oklahoma State to a 67-58 win over No. 5 seed Iowa State on Saturday in the quarterfinals of the Big 12 tournament. Liz Donohoe added 14 points for the Cowgirls (20-10), who face top-seeded and sixth-ranked Baylor in Sunday’s semifinals. Johnson hit 6 of 9 shots, including a pair of 3-pointers, and Oklahoma State shot 55.6 percent in the first half to open a 34-21 lead.

After the Cyclones opened the second half with a basket, OSU reeled off nine straight points, with Donohoe’s free throws making it 43-23 with 15:54 left. The lead was 11 with five minutes to play when ISU scored eight straight, pulling within 59-56 with 1:32 to go on Nikki Moody’s 3 but the Cowgirls hit 4 of 6 free throws in the last minute.

Moody had 17 points for Iowa State (18-12) and Brynn Williamson and Seanna Johnson had 16 each and combined for 23 rebounds.