Nobody in the NBA was knocking down Ryan Arcidiacono’s door when his junior season ended a year ago. Buddy Hield — that was a different story.

Arcidiacono stayed at Villanova because he had no other choice. Hield stayed at Oklahoma because he had unfinished business.

The guards, who lead their respective teams in very different ways, are each closing out their senior year at the top of their sport — with a trip to the Final Four.

“It’s four years of commitment to Villanova and to a program,” Arcidiacono said, when asked to describe his emotions as he sprinted in circles after the Wildcats defeated Kansas.

The Oklahoma-Villanova semifinal Saturday will pit a pair of No. 2 seeds who knocked off the top seeds in their regions to earn their trips to Houston.

The second semifinal will pit 10th-seeded Syracuse, only the fourth double-digit seed to make the Final Four, against North Carolina in an ACC rematch. The Tar Heels, who beat Notre Dame 88-74 to become the only top seed to make the Final Four, have already beaten the Orange twice this season.

“It means a lot,” said senior Brice Johnson, the team’s leading scorer and rebounder, whose first Final Four will be the program’s record 19th. “It took us four years to do this, but we’re finally there.”

Syracuse, a bubble team that many people didn’t think belonged in the tournament, finished its 68-62 win in the Midwest Regional over top-seeded Virginia on a 29-8 run.

“In my 40 years coaching basketball, I’ve never been prouder of a team,” said Syracuse coach Jim Boeheim, leading the Orange to the Final Four for the fifth time.