Tyler Thornton kept finding himself open, so he kept shooting. Fortunately for Duke, he made enough of them to fend off a one-and-done for the perennial champs of the Atlantic Coast Conference tournament. Thornton scored a career-best 13 points and Austin Rivers hustled for a clinching three-point play that carried the sixth-ranked Blue Devils to a 60-56 victory over cold-shooting Virginia Tech in the ACC quarterfinals Friday night.