ANN ARBOR, Mich. -- Naz Hillmon scored a career-high 30 points and pulled down 10 rebounds to lead Michigan to a 78-63 win over No. 18 Iowa on Sunday.

Hillmon shot 14 of 19 from the floor and collected her seventh double-double this season.

The Wolverines (14-7, 5-5 Big Ten) got their first win over a ranked opponent this season after four losses and their first victory over a Top 25 team since beating Iowa on Feb. 1 last year in Ann Arbor.

Amy Dilk added 14 points and six assists and Akienreh Johnson 11 points and seven rebounds for Michigan.

Alexis Sevillian led Iowa with 15 points, Kathleen Doyle added 14, Makenzie Meyer 13 and Amanda Ollinger 10 points with eight rebounds.

The Hawkeyes (18-4, 9-2) had a nine-game win streak snapped and dropped into a first-place tie with No. 23 Northwestern (9-2), a half-game ahead of No. 17 Maryland (8-3).

Hillmon scored the game's first two baskets, Dilk added another and the Wolverines led throughout. They were up by 19 midway through the third quarter and Iowa only got as close as eight with 1:46 left in the game before the Wolverines finished on a 9-2 run.