North Carolina 78, Villanova 71: P.J. Hairston scored 23 points and hit five 3-pointers to lead four players in double figures as the Tar Heels topped the Wildcats in the second round of the NCAA Tournament in Kansas City.Eight-seed North Carolina (25-10) advances to face either top-seed Kansas or Western Kentucky in the round of 32 on Sunday. James Michael McAdoo added 17 points for the Tar Heels.JayVaughn Pinkston led Villanova (20-14) with 20 points. Villanova led by one point early in the second half before the Tar Heels surged ahead. North Carolina held a slender 70-68 on Mouphtaou Yarou's layup with 1:44 remaining, but North Carolina finished the game on an 8-3 run.Reggie Bullock scored 15 points and Marcus Paige added 14 points for North Carolina. The Tar Heels shot 49 percent from the field and hit 11 3-pointers.Darrun Hillard added 18 points and Yarou scored 17 for the Wildcats. Villanova shot 4-for-21 from 3-point rangeGAME NOTEBOOK: North Carolina coach Roy Williams won his 700th career game. … Bullock added three 3-pointers. … Villanova outrebounded the Tar Heels 35-18.