Gustafson also had 16 rebounds for her 77th career double-double, tying the conference record with former Ohio State star Jantel Lavender.

Iowa led 31-27 at the half. Gustafson opened the second-half with a three-point play and had 15 points in the quarter to help the Hawkeyes take a 58-37 lead.

Iowa shot 69 percent in the second half.

Iowa 78, Ohio St. 52

IOWA (19-5) — Stewart 3-5 1-1 7, Gustafson 14-19 1-1 29, Davis 3-9 0-0 7, Doyle 5-13 5-8 16, Sevillian 2-5 0-0 6, Cook 1-1 0-0 3, Czinano 2-3 2-3 6, Ollinger 0-1 1-2 1, Valino Ramos 0-0 0-0 0, Sanders 0-0 0-0 0, Taiwo 1-2 0-0 3, Totals 31-58 10-15 78.

OHIO ST. (10-12) — Juhasz 5-10 2-4 12, Waterman 2-7 0-0 5, Crooms 4-9 1-2 10, Grande 0-2 0-0 0, Santoro 0-6 0-0 0, Jayaraman 0-1 0-0 0, Patty 5-10 1-4 11, Caretti 1-5 0-0 3, Miller 3-9 3-4 11, Queenland 0-2 0-0 0, Totals 20-61 7-14 52.

Iowa 19 12 27 20 — 78

Ohio St. 9 18 10 15 — 52

3-point goals — Iowa 6-19 (Davis 1-6, Doyle 1-5, Sevillian 2-5, Cook 1-1, Taiwo 1-2), Ohio St. 5-19 (Juhasz 0-2, Waterman 1-1, Crooms 1-2, Grande 0-1, Santoro 0-2, Patty 0-2, Caretti 1-3, Miller 2-4, Queenland 0-2). Assists — Iowa 22 (Doyle 6), Ohio St. 10 (Crooms 7). Fouled out — Ohio St. Waterman, Patty. Rebounds — Iowa 43 (Gustafson 16), Ohio St. 32 (Juhasz 10). Total fouls — Iowa 12, Ohio St. 17. A — 5,344.