AMES, Iowa (AP) -- Brynn Williamson scored a career-high 21 points and 17th-ranked Iowa State beat No. 21 Iowa 83-70 Thursday night for its best start in 12 years.
Jadda Buckley had 19 points and Hallie Christofferson scored 18 with 14 rebounds for the Cyclones, who are 9-0 for the first time since starting 12-0 in 2001-02.
Iowa State also improved to 9-0 at home against the Hawkeyes under coach Bill Fennelly.
Iowa (10-2) came in with the Big Ten's top offense. But the Hawkeyes had just 20 free-throw tries compared to 49 for Iowa State.
Samantha Logic scored 18 for Iowa, which had its six-game winning streak snapped.
The Cyclones took control with a 13-0 run late in the first half. They later extended a 13-point lead to 52-32 with 15:16 left.