Syracuse (19-7, 7-6 Atlantic Coast) shot 11-of-19 from 3 in the first half on Thursday. The second half didn’t come as easily though. The Orange scored just 25 points in the final 20 minutes. But when it mattered, Tiana Mangakahia knocked down her fifth 3 and SU got a key stop. It was enough to upset No. 17 Duke (20-7, 9-5), 68-65, in a crucial win as the regular season winds down.