Ty Lawson helped Tyler Hansbrough make it four in a row at Cameron Indoor Stadium, while keeping himself perfect against North Carolina’s most despised rival.

Lawson scored 21 of his 25 points in the second half, and No. 3 North Carolina rallied past No. 6 Duke 101-87 on Wednesday night.

Hansbrough scored 17 points — and hit another late 3-pointer — for the Tar Heels (22-2, 8-2), who became the first team in nine seasons to hit triple digits against Duke.

Kyle Singler scored 22 points and Jon Scheyer added 20 to lead Duke (20-4, 7-3), which kept up with the uptempo Tar Heels for about 30 minutes before spiraling to its fifth loss in six meetings with its hated rival located 8 miles down Tobacco Road.