We know what Flagg can do but with Brown, UNC found out first hand on Saturday. When Brown entered the game in the second half with UNC up seven, Duke went on a big run. He essentially took RJ Davis out of the game with his length and he's an issue on switches for guards.

With UNC's season hanging in the balance, emotion started to boil over with eight minutes left to play. Instead of unraveling the Tar Heels, the intensity reset them.

The latest chapter in college basketball's most storied rivalry will take center stage at the ACC Tournament on Friday, as the North Carolina Tar Heels face the Duke Blue Devils at Spectrum Center in Uptown Charlotte.