Grayson Allen scored 23 points, and the freshman Derryck Thornton came through with a game-clinching block on the final play to help No. 20 Duke (21-5, 10-3 Atlantic Coast Conference) edge No. 5 North Carolina, 74-73, in Chapel Hill on Wednesday night.
TEXAS TECH 65, OKLAHOMA 63 Aaron Ross scored 17 points, Keenan Evan added 14, and Texas Tech (16-9, 6-7 Big 12) beat No. 3 Oklahoma (20-5, 8-5) at home.
PENN STATE 79, IOWA 75 Donovon Jack scored 19 points on 8-of-9 field-goal shooting, and Penn State (13-13, 4-9 Big Ten) edged No.