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.