CHARLOTTE, N.C.>> RJ Davis scored 20 points to help North Carolina beat Michigan State 85-69 in the NCAA Tournament on Saturday, pushing the Tar Heels to the Sweet 16 while keeping them unbeaten in March Madness against Spartans Hall of Fame coach Tom Izzo.

Harrison Ingram made five 3-pointers and scored 17 points for the West Region’s top seed, which continued its NCAA success in its home state. UNC (29-7) ran off 17 straight points during a 23-3 run over the last eight minutes of the first half to erase a 12-point deficit, then continued answering every push by the Spartans after halftime.

The Tar Heels improved to 5-0 in the tournament against Izzo, including victories in the 2005 Final Four and 2009 title game. And they move on to the regional semifinals in Los Angeles, where they will face either Grand Canyon or Alabama on Thursday night.

UNC also got a strong showing inside from Armando Bacot (18 points), who got into the paint to score, draw fouls or kick out against oncoming double teams. Ingram was on the receiving end of some of those, knocking down 5 of 7 3-pointers to go with seven rebounds.

Tyson Walker scored 24 points for the ninth-seeded Spartans (20-15), who were playing what amounted to a road game about a 2 1/2-hour drive from Chapel Hill.

One of Ingram’s 3s seemed destined to miss when it caught iron, only to somehow take a soft lap all the way around the rim and drop through — giving the Heels a 69-57 lead with 6:18 left.