GREENSBORO, N.C. (AP) — Tiffany Mitchell drove to the basket and scored with 4.2 seconds left and South Carolina beat North Carolina 67-65 on Friday night in the NCAA Tournament’s round of 16.Mitchell finished with 18 points for the No. 1-seeded Gamecocks (33-2), who had to fight the entire way to push past UNC in a rematch of last year’s Sweet 16 game and advance to the Greensboro Regional final against Florida State on Sunday.Alaina Coates also scored 18 points, including two key free throws for the lead with 46.1 seconds to go. Then Mitchell, the Southeastern Conference player of the year, answered a tying basket from Jessica Washington in the final minute by driving past Brittany Rountree for what turned out to be the winning score.Fourth-seeded UNC (26-9) had one more chance, but freshman Jamie Cherry’s desperation runner hit all backboard as the horn sounded, sending the Gamecocks into an on-court celebration.FLORIDA STATE 66, ARIZONA STATE 65GREENSBORO, N.C. (AP) — Leticia Romero scored a career-high 21 points for Florida State.Adut Bulgak had 15 points and Maegan Conwright added 11 to send the second-seeded Seminoles (32-4) to the regional final — just the second Elite Eight appearance in program history.Katie Hempen had 22 points for the third-seeded Sun Devils (29-6),OKLAHOMA CITY REGIONALNOTRE DAME 81, STANFORD 60OKLAHOMA CITY (AP) — Lindsay Allen scored a career-high 28 points to help top-seeded Notre Dame advance.Jewell Loyd scored 17 of her 21 points in the second half for the Fighting Irish (34-2), who will play Baylor (33-3) on Sunday for a spot in the Final Four.