The first ACC Tournament semifinal features one of the most storied rivalries in college sports as the Duke Blue Devils (29-3, 20-1) take on the Tar Heels of North Carolina (22-12, 15-7). Storylines abound but the largest is Cooper Flagg's availability.

With the bright lights of the ACC Tournament shining, expect a high-intensity battle between two bitter rivals.

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.