By Andrew Gould The Tar Heels couldn’t have asked for a better Saturday. North Carolina spoiled Mike Krzyzewski’s final game at Cameron Indoor Stadium with a 94-81 upset over Duke. In addition to derailing the rival’s celebratory occasion, the Tar Heels fortified their March Madness bid with a monumental road victory over the No. 4 Blue Devils. Unfortunately, Dick Vitale was unable to attend the seminal showdown. The ESPN analyst, who was diagnosed with lymphoma and vocal cord dysplasia last October, has stepped away from broadcasting to focus on his recovery. Yet he was certainly watching. On…