By JOHN MARSHALL
AP Basketball Writer
Duke coach Mike Krzyzewski’s final chapter will have a distinctly blue tint. Two weeks of upsets and underdogs in the books, the Final Four is down to four blue blood programs: Kansas, the Blue Devils, North Carolina and Villanova. Kansas faces Villanova, then it’s Duke-Carolina for the first time in the NCAA Tournament next weekend in New Orleans. This could be an epic Final Four.