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Durham, N.C. • Grayson Allen scored 25 points and Duke beat North Carolina 86-78 on Thursday.

Luke Kennard added 20 points and freshman Jayson Tatum had all 19 of his in the second half to help the Blue Devils (19-5, 7-4 Atlantic Coast Conference) win their fourth straight.

Justin Jackson scored 21 points and Joel Berry II finished with 15 for the Tar Heels (21-5, 9-3), who were just 10 of 18 from the free throw line — 8 of 15 in the second half — in dropping into a first-place tie with Florida State.

This renewal of one of college basketball's fiercest rivalries lived up to its pedigree, with 17 lead changes, nine ties and neither team leading by more than eight points.

With former Duke greats Christian Laettner and J.J. Redick looking on from the crowd at Cameron Indoor Stadium, Allen hit the most important shot of the night, a 3-pointer over Jackson with about 1:15 left to put the Blue Devils up 80-75.

After Berry hit two free throws with 1:02 left to pull the Tar Heels within three, Duke played keep away and that set up an open 3-pointer for Tatum that bounced high off the back iron. Matt Jones beat Berry to the rebound and Frank Jackson then hit a free throw to put the Blue Devils up 81-77.

Berry raced down court and missed an up-and-under layup, and Tatum grabbed the rebound with about 20 seconds remaining to put Duke in control.

No. 1 Gonzaga 90, Loyola Marymount 60

Nigel Williams-Goss had 19 points and 11 rebounds and Gonzaga continued its roll with a victory over Loyola Marymount.

Gonzaga — the last remaining unbeaten team in Division I — pushed its record to 25-0 overall and 13-0 in the West Coast Conference.

The balanced Bulldogs also received 13 points from Jonathan Williams, and 11 points each from Jordan Matthews, Zach Collins and Killian Tillie.

Loyola (11-13, 4-9) was led by Steven Haney's 12 points, all coming on his four 3-pointers. Brandon Brown and Buay Tuach each had 11 points for the Lions.

Gonzaga had a huge advantage in free throws, making 34 of 44, while Loyola went to the line just eight times, making four.

No. 7 Wisconsin 70, Nebraska 69, OT

Nigel Hayes hit the go-ahead 3-pointer with 18.4 seconds left in overtime and Ethan Happ blocked Tai Webster's shot on Nebraska's last try, giving Wisconsin a 1-point victory.

Nebraska's Michael Jacobson forced overtime with his 3 just ahead of the buzzer, tying the game at 58-all.

Hayes scored 18 of his 20 points after halftime for the Badgers (21-3, 10-1 Big Ten), who won their eighth straight and 17th of their last 18.

Zak Showalter made 4 of 6 3s and finished with 15 points, and Bronson Koenig added 12 for Wisconsin.

Webster had 19 points and Glynn Watson Jr. added 15 for the Huskers (10-14, 4-8), who have lost eight of their last nine.

No. 16 Purdue 69, Indiana 64

Vince Edwards matched his career-high with 26 points and Caleb Swanigan added 16 points and 14 rebounds Thursday night as No. 16 Purdue used a late charge to beat rival Indiana 69-64.

The Boilermakers (20-5, 9-3 Big Ten) have won three straight and six of seven to move into second place in the conference.

Thomas Bryant scored 23 points and James Blackmon Jr. added 11 in his return from a lower left leg injury. It still wasn't enough for Indiana (15-10, 5-7), which has lost two in a row and four of five.

No. 18 Duke 86, No. 8 North Carolina 78

No. 20 St. Mary's 51 Portland 41

Jock Landale had 13 points and 10 rebounds and Saint Mary's overcame its worst shooting game of the season to beat Portland.

The Gaels (22-2, 12-1 West Coast Conference) used an 11-2 run midway through the second half to erase a 29-28 deficit and set up Saturday's duel with unbeaten and top-ranked Gonzaga at McKeon Pavilion.

Emmett Naar added 11 points and Joe Rahon scored 10 for the Gaels, who shot 14 for 18 from the free throw line in the second half after not attempting a foul shot in the opening 20 minutes.

The Gaels' 51 points matched their season low. They shot 30.6 percent (15 for 49) after starting 3 for 16.

Jazz Johnson scored 10 points for the last-place Pilots (9-16, 2-11), who lost their 11th straight game. Portland shot just 26 percent in the second half, when it scored only 19 points.

No. 25 SMU 66, Temple 50

Semi Ojeleye scored a career-high 30 points and added 10 rebounds to lead SMU past Temple for its seventh straight win.

Sterling Brown added 10 points and nine rebounds for the Mustangs (21-4, 11-1 American Athletic Conference), who earlier in the week vaulted into the national rankings for the first time this season.

One of the hottest teams in the nation, SMU has won 17 of its last 18.

Shizz Alston Jr. scored 13 points to lead the Owls (13-12, 4-8), who saw a modest two-game winning streak snapped. Quinton Rose had 12 points and Daniel Dingle finished with 10.

Trailing by as many as 15 points in the second half, Temple pulled within six with just under 8 minutes remaining. But Ojeleye answered with a big 3-pointer to stymie the Owls' rally. —

Thursday's scores

• No. 1 Gonzaga 90, Loyola Marymount 60

• No. 7 Wisconsin 70, Nebraska 69, OT

• No. 16 Purdue 69, Indiana 64

• No. 18 Duke 86, No. 8 North Carolina 78

• No. 20 St. Mary's 51 Portland 41

• No. 25 SMU 66, Temple 50