Isaiah Evans puts Duke in front of Siena with a sweet move inside. (0:19) GREENVILLE, S.C. -- Duke barely avoided a shocking upset to open the NCAA tournament, with the No. 1 overall seed having to rally from 13 points down and going ahead for good in the final five minutes to beat 16th-seeded Siena 71-65 on Thursday. Cameron Boozer had 22 points and 13 rebounds for the East Region's headliner, which hit its first four shots yet need a comeback against a fearless upstart playing just five players right up to the final seconds. And yet, the Saints took it to the Blue Devils (33-2) at every turn. No. 1 seeds entered the week with a 158-2 record against 16-seeds in the tournament, the outliers being Virginia's loss to UMBC in 2018 and Purdue's loss to Fairleigh Dickinson in 2023. And Duke -- a blueblood with five NCAA titles -- spent much of Thursday in serious danger of being added to that list before finally wrestling away control of the game in the last eight minutes.…