In Durham, N.C., freshman Kyrie Irving scored a season-high 31 points, and No. 1 Duke (7-0) beat No. 6 Michigan State (5-1) 84-79 last night in the marquee matchup of the ACC/Big Ten Challenge. Nolan Smith added 17 points for the Blue Devils.

Pittsburgh 80, Duquesne 66

In Pittsburgh, Ashton Gibbs scored 22 points, and No. 3 Pittsburgh (8-0) beat its city rival Duquesne (3-2) in the first basketball game in the Consol Energy Center.

Harvard 80, Fordham 57

In Cambridge, Mass., Laurent Rivard made five 3-pointers on the way to scoring 21 points as Harvard (5-1) defeated 2-4 Fordham.

Buffalo 56, Army 54

In West Point, Byron Mulkey hit a basket with 12.3 seconds remaining to give Buffalo (4-2) a 56-54 win over 4-3 Army.

Central Fla. 57, Florida 54

In Orlando, Fla., Keith Clanton hit two free throws in the final seconds and Central Florida (6-0) upset No. 18 Florida (5-2).

UNLV 82, Illinois St. 51

In Normal, Ill., sophomore guard Anthony Marshall scored 16 points to help No. 24 UNLV (7-0) remain undefeated with a victory over Illinois State (5-2).

Purdue 58, Va. Tech 55

In Blacksburg, Va., Purdue’s big man JuJuan Johnson scored 29 points, including a go-ahead 15-footer with 1:27 left in overtime, and the 22nd-ranked Boilermakers (6-1) beat Virginia Tech (4-3), clinching the ACC/Big Ten Challenge for the Big Ten for the second straight season.

Memphis 78, Ark. St. 71

In Memphis, Tenn., Will Barton scored 20 points and No. 14 Memphis (6-0) survived with an overtime win over 1-6 Arkansas State.

Rutgers 66, NJIT 53

In Piscataway, freshman Gilvydas Biruta scored a career-high for the third straight game, scoring 20 points to lead Rutgers (4-2) past the New Jersey Institute of Technology (1-4).