North Carolina's Coby White defends as Duke's Tre Jones (3) drives to the basket during the first half of an NCAA college basketball game in Chapel Hill, N.C., Saturday, March 9, 2019. (AP Photo/Gerry Broome)

North Carolina's Kenny Williams (24) drives to the basket as Duke's RJ Barrett defends during the first half of an NCAA college basketball game in Chapel Hill, N.C., Saturday, March 9, 2019. (AP Photo/Gerry Broome)

North Carolina's Nassir Little (5) drives to the basket as Duke's Cam Reddish (2) and Javin DeLaurier, left, defend during the first half of an NCAA college basketball game in Chapel Hill, N.C., Saturday, March 9, 2019. (AP Photo/Gerry Broome)

Injured Duke player Zion Williamson, left, sits on the bench during the first half of an NCAA college basketball game against North Carolina in Chapel Hill, N.C., Saturday, March 9, 2019. (AP Photo/Gerry Broome)

North Carolina's Coby White (2) reacts following a play against Duke during the second half of an NCAA college basketball game in Chapel Hill, N.C., Saturday, March 9, 2019. North Carolina won 79-70. (AP Photo/Gerry Broome)

Duke head coach Mike Krzyzewski checks on an injured Marques Bolden during the first half of an NCAA college basketball game against North Carolina in Chapel Hill, N.C., Saturday, March 9, 2019. (AP Photo/Gerry Broome)

North Carolina's Luke Maye, left, and Duke's Tre Jones battle for the ball during the first half of an NCAA college basketball game in Chapel Hill, N.C., Saturday, March 9, 2019. (AP Photo/Gerry Broome)

North Carolina's Cameron Johnson and Luke Maye (32) chase the ball with Duke's Javin DeLaurier, left, Cam Reddish (2) and RJ Barrett during the second half of an NCAA college basketball game in Chapel Hill, N.C., Saturday, March 9, 2019. North Carolina won 79-70. (AP Photo/Gerry Broome)

North Carolina's Kenny Williams (24) drives to the basket while Duke's RJ Barrett defends during the first half of an NCAA college basketball game in Chapel Hill, N.C., Saturday, March 9, 2019. (AP Photo/Gerry Broome)

North Carolina's Kenny Williams (24) and Coby White (2) react following a play against Duke during the second half of an NCAA college basketball game in Chapel Hill, N.C., Saturday, March 9, 2019. North Carolina won 79-70. (AP Photo/Gerry Broome)

North Carolina coach Roy Williams reacts during the second half of the team's NCAA college basketball game against Duke in Chapel Hill, N.C., Saturday, March 9, 2019. North Carolina won 79-70. (AP Photo/Gerry Broome)

North Carolina's Kenny Williams (24) falls to the floor with Duke's Cam Reddish during the second half of an NCAA college basketball game in Chapel Hill, N.C., Saturday, March 9, 2019. North Carolina won 79-70. (AP Photo/Gerry Broome)

North Carolina's Luke Maye, left, and Duke's Tre Jones (3) struggle for possession of the ball during the first half of an NCAA college basketball game in Chapel Hill, N.C., Saturday, March 9, 2019. (AP Photo/Gerry Broome)

North Carolina coach Roy Williams reaches for Cameron Johnson (13) following Johnson's basket against Duke while Duke's Javin DeLaurier (12) looks back during the second half of an NCAA college basketball game in Chapel Hill, N.C., Saturday, March 9, 2019. North Carolina won 79-70. (AP Photo/Gerry Broome)

Duke coach Mike Krzyzewski speaks with an official during the second half of the team's NCAA college basketball game against North Carolina in Chapel Hill, N.C., Saturday, March 9, 2019. North Carolina won 79-70. (AP Photo/Gerry Broome)

North Carolina's Garrison Brooks (15) reaches for the ball against Duke's Alex O'Connell (15) and Tre Jones (3) during the first half of an NCAA college basketball game in Chapel Hill, N.C., Saturday, March 9, 2019. (AP Photo/Gerry Broome)

North Carolina's Cameron Johnson (13) and Duke's Cam Reddish struggle for the ball during the second half of an NCAA college basketball game in Chapel Hill, N.C., Saturday, March 9, 2019. North Carolina won 79-70. (AP Photo/Gerry Broome)