BLOOMINGTON, Ind. -- Marvin Bagley III scored 23 points and Grayson Allen added 21 to lead No. 1 Duke to a 91-81 victory over Indiana University in the ACC/Big Ten Challenge on Wednesday night.
After Indiana closed to deficit to 78-77, the Blue Devils (9-0) finished the game with a 13-4 spurt.
Duke forward Wendell Carter Jr. fouled out late with 18 points, on 7-of-9 shooting, and 12 rebounds.
Bagley hit 10 of 15 shots from the field and grabbed 10 rebounds.
Robert Johnson was high for the Hoosiers (4-3) with 17 points, also fouling out late.
Duke hit 33 of 60 shots (55 percent) while Indiana was 30 of 59 (50.8 percent) from the field.
A three-point play by Carter gave Duke a 78-75 lead with 4:32 to go. Following a pair of free throws by De'Ron Davis to slice the lead to 78-77, Allen sank a 3-pointer to give the Blue Devils a 81-77 advantage.
Davis, who scored 16 points, was 6 of 7 from the field but made just 4 of 9 from the free-throw line.
The Blue Devils, who led 42-38 at halftime, took a 52-42 lead before the Hoosiers rallied with a 15-5 spurt to tie it at 57-all on a 3-pointer by Collin Hartman.
Following a layup by Javin DeLaurier, Davis tied it with a layup but missed the free throw. Hartman got the free throw. He was fouled on a drive and made both free throws to give the Hoosiers a 61-59 lead.
Johnson hit a layup to push Indiana's advantage to 63-59 with 11:48 to go. The lead went back and forth over the next several minutes.
The Blue Devils sank 18 of 33 shots (54.5 percent) to take a four-point lead at halftime. The Hoosiers made 16 of 35 shots (45.7 percent) to stay close.
The game was tied 11 times with 10 lead changes in the first half. Both struggled from the 3-point line with Indiana making just 3 of 15 and Duke 2 of 10 before intermission.
NOTES: Duke has won four in a row against Indiana and leads the overall series 6-3 and 2-0 in Bloomington. ... Duke is 17-2 in the 18-year history of the ACC/Big Ten Challenge. Indiana is 7-10. ... F Marvin Bagley III became the first player in Duke history to have back-to-back 30-point, 15-rebound games when he did it in the PK80 Invitational in Portland, Ore. Bagley entered the Wednesday game tied for the NCAA lead with six double-doubles in the first eight games. He got his seventh Wednesday night... Indiana F Collin Hartman played in his second game of the season after missing the first five game with a groin injury. Hartman missed all of last season with a knee injury.