Manny Arop scored a game-high 27 points to lead Indiana State to an 87-85 overtime win over Mississippi today in a quarterfinal game of the Diamond Head Classic.

Jake Odum had 16 points, eight rebounds and four assists for the Sycamores (6-3). Justin Gant and R.J. Mahurin scored 12 points apiece and Dawon Cummings had 10 points for Indiana State, which will meet the winner of San Francisco and No. 18 San Diego State in Sunday’s semifinals.

Ole Miss’ Derrick Millinghaus hit a 3-pointer with 1:03 left in regulation to tie it at 75.

Jarvis Summers made two free throws 15 seconds into overtime to give Ole Miss its first lead since it led 27-25 with about 8 minutes left in the first half. But Indiana State went on a 10-2 run to reclaim the lead at 85-79 and withstood a late charge by Ole Miss.

After a free throw by Summers, Marshall Henderson drained a long 3-pointer from about 28 feet to cut the Sycamores’ lead to 85-83 with 16.8 seconds remaining.

Odum made two free throws with 11.1 seconds to play to make it a four-point lead for Indiana State. Henderson missed a long 3 on the Rebels’ next possession, but Reginald Buckner grabbed the loose ball and scored to close it to 87-85.

Ole Miss had a chance to tie it or win after the Sycamores turned it over in the closing seconds, but Summers’ desperation heave from near midcourt was no good.

Henderson led the Rebels with 27 points. Buckner finished with 17 points with 10 rebounds and Murphy Holloway added 16 points and 13 rebounds.

Ole Miss built a 24-14 lead near the midway point of the first half off an 18-footer by Nick Williams, but Indiana State used a 23-3 run to pull ahead, 37-27, with 2:46 remaining in the first half. The Rebels went scoreless for a stretch of 6:21 in the first half.

Indiana State, which made 5 of 9 on 3-pointers in the first half, finished 9 of 20 from behind the arc for the game. The Sycamores made 18 of 24 free throws, while the Rebels got to the line just 13 times and made seven.

Gant, a sophomore center, had 11 rebounds and played 41 minutes — the most by any player. Arop, a junior forward, was 9 of 15 from the field, including 4 of 5 on 3-pointers and 5 of 6 from the free-throw line. He had 16 points by halftime.

Henderson, who entered the game averaging 17.8 points, made 10 of his 23 field goals, including 7 of 16 3-pointers. He scored 16 of his points after halftime for the Rebels, who rallied from as many as 11 downs.

The Rebels scored 24 points off 13 Indiana State turnovers and got 29 second-chance points to the Sycamores’ 15. There were 11 ties and six lead changes in the game.

Indiana State led 44-33 at halftime.

The Rebels (8-2) had their two-game winning streak snapped and will play in a consolation semifinal Sunday.