No. 3 North Carolina swept its regular-season series against No. 4 Duke for the first time since the 2008-09 season with a 79-70 victory in Chapel Hill, N.C., on Saturday — but UNC coach Roy Williams said his Tar Heels played "ugly" at times.

"It was a big time win. It was ugly as it could be," Williams told reporters after the win. "The last six minutes, I think we made no field goals. Cam (Johnson) stepped up to the free-throw line and made two big free throws. Garrison (Brooks) stepped up and had really struggled, but made two big free throws. Cody (White) was a mess there for a while. It was hard for people to handle."

While Williams ultimately was happy with the victory, he explained that he expressed dissatisfaction during halftime with how the Tar Heels had played the first 20 minutes of the game. The seniors came out of the break and scored the first 12 points for UNC, and Williams believes his speech helped motivate the players to flip the momentum and finish the game strong.