TUCSON, Ariz. -- Seconds after No. 12 Duke's players ran onto the court for pregame introductions at the McKale Center on Friday night, someone in the crowd hurled a beer can in their direction.

That moment did not define the largely positive and vibrant atmosphere at the arena, where Cooper Flagg's 24-point effort led the Blue Devils to a 69-55 win over No. 17 Arizona.

But throughout the game, building security and local police gathered near Duke's tunnel and the team's family and friends section because of concerns that additional objects would be thrown, sources told ESPN. Those same security and police personnel entered the Arizona student section at halftime to address at least one fan's behavior.

Duke coach Jon Scheyer said he didn't notice the off-court chaos, a metaphor for the way his team responded in its first true road game of the season.

"I didn't even see that," Scheyer said afterward about the beer-can incident. "First of all, I thought the environment and atmosphere was top notch. I mean, people were respectful. I thought there was just a big-time college basketball crowd, but at the end of the day, the crowd doesn't control how you defend, how you sprint back on defense, how you take care of the ball."

More than 14,000-plus gathered for the highly anticipated matchup involving a pair of teams that hadn't met in Tucson since the 1980s. The notable personalities in the crowd gave the game a prime-time vibe. Flagg, the projected No. 1 pick in the 2025 NBA draft, and his teammates faced an Arizona squad led by Caleb Love, a preseason All-American.

Mike Bibby and Gilbert Arenas, a pair of former NBA stars who anchored some of Arizona's greatest teams, sat in the front row. Phoenix Suns star Bradley Beal found his seat next to theirs early in the game, and Beal's teammates Tyus Jones and Grayson Allen -- who starred on Duke's 2014-15 national title team -- sat behind the Blue Devils' bench.

Bryce James, the son of LeBron James and a prospect in the 2025 recruiting class, attended the matchup with his mother, Savannah.

Flagg delivered his best performance this season in another high-profile matchup, more than a week after he committed multiple turnovers in the final seconds of a loss to Kentucky in the Champions Classic in Atlanta. Arizona seemed to corral him in the first half, but Flagg dominated after the break, scoring 16 points.

Flagg, who shot 10-of-22 from the field, also finished with 6 rebounds, 3 assists, 2 blocks and 1 steal.

"He is tall, athletic, and he can finish over a lot of bodies," Arizona's Jaden Bradley, who led his team with 18 points, said of Flagg. "He's just super athletic. I feel like we did a good job of containing him in the first half. I think we just went away from the game plan and then didn't talk, didn't communicate as a group, and he found openings in our defense. He provides mismatch problems for them. We get a smaller guard on him, he can take us inside and use his strength, his height advantage. We get a bigger guy on him, he can play quick, play fast and be able to shoot over the top or get by him."

As his team entered halftime up 34-27, Scheyer said, "We've been here before," referencing Duke's halftime lead over Kentucky in the Champions Classic loss. But Duke avoided a similar fate Friday when Flagg, Tyrese Proctor (8 points, 4 assists, 4 rebounds) and Kon Knueppel (13 points, 3-for-6 on 3-pointers) wouldn't yield.

"It was a high-level college basketball game," Flagg said. "It was really physical, and they're a very physical team. So I guess I found my footing [in the second half]."

Arizona entered the game ranked top five in adjusted tempo on KenPom, and the Wildcats were also the top offensive rebounding team in the country. But against the Blue Devils, Arizona scored only six points on fast breaks and grabbed only six offensive rebounds.

After the game, the fears of security and police personnel were not realized. There were no further incidents, and Duke's players, staff, family members and friends all safely exited the building without issue.

The Blue Devils, who next face No. 1 Kansas in Las Vegas on Tuesday, had weathered storms on and off the court in their first true road test. Scheyer said he was impressed by his team's resilience in a hostile environment, especially as Arizona tried to close the gap late.

"I thought there were a couple of stretches at the beginning of the second half late when I think it got cut to eight points ... but to have the maturity to answer and then come back on defense, I think that's a credit to these guys," he said. "We've done a lot of game situations this year and in the preseason [in practice], but it's really the maturity by them."