Virginia has only one flaw on its schedule so far this season. The Cavaliers were ranked No. 4 in the country when they visited top-ranked Duke on Jan. 19. Duke rode the roars of its raucous home crowd to a 72-70 victory. Now, three Saturdays later, their storied rivalry heats up again as they both are ranked in the top three, and both are looking for No. 1 seeds in next month’s NCAA tournament pairings.