Italee Lucas scored 17 points to lead the Tar Heels (21-3, 7-2 Atlantic Coast Conference).
Gray had a season-high 20 points to lead the Blue Devils (21-2, 7-1) and had a chance to tie the game after rebounding a missed jumper from Tierra Ruffin-Pratt with about 6 seconds left. She raced upcourt and tried to force up a driving layup, but Rolle was waiting to block it away.
Rolle finished with 10 points, nine rebounds and seven blocks.
NO. 4 TENNESSEE 73, NO. 15 KENTUCKY 67
In Lexington, Ky., Shekinna Stricklen scored 20 points and Tennessee overcame major turnover trouble to beat Kentucky.
The Lady Vols (22-2, 10-0 Southeastern Conference) won their 13th in a row despite turning it over 24 times in the face of the Wildcats' relentless pressure.
Meighan Simmons added 15 points for Tennessee, including the clinching free throws with 14.5 seconds left.
Victoria Dunlap led Kentucky (18-5, 7-3) with 20 points, and A'dia Mathies added 18 points.
NO. 19 FLORIDA STATE 78 VIRGINIA 74
In Charlottesville, Va., Cierra Bravard scored 22 points and grabbed nine rebounds and Florida State withstood a furious rally.
The Seminoles (18-5, 6-2 Atlantic Coast Conference) led 39-32 at halftime and used a 14-4 burst to open the second half.
Virginia (13-12, 2-7) used a 21-7 run to close to within 74-72 on Ariana Moorer's layup with 47 seconds left, then stole the inbounds pass, but Paulish Kellam was called for traveling while driving to the basket and Natasha Howard scored at the other end.
After another basket by Virginia's Ataira Frankling with 5 seconds left against made it a 2-point game, Bravard hit a pair of free throws with 3.9 seconds to play to clinch it.