Maalik Murphy threw two touchdown passes after regulation and a dormant Duke offense suddenly clicked in a 26-20 double-overtime victory over Northwestern on Friday night in Evanston, Ill.Northwestern’s Cam Porter ran for a 10-yard touchdown to open the overtime scoring. One play later, Duke scored its first touchdown since the opening quarter on Murphy’s 25-yard pass to Jordan Moore.In the second OT, Murphy hit Moore for 22 yards and then connected with Eli Pancol for a 3-yard score, but the two-point-conversion attempt failed.The Blue Devils stopped Northwestern’s final possession after the Wildcats reached the 3-yard line.Duke (2-0) was in field-goal range twice in the waning minutes of regulation, converting on Todd Pelino’s tying kick from 22 yards out with 14 seconds left after a Blue Devils lost fumble was overturned by replay review.Pelino missed a 33-yard field-goal attempt with 2:04 remaining after Duke had moved 64 yards on eight plays. The Blue Devils got another chance following a Northwestern punt.Jack Olsen’s 35-yard field goal early in the fourth quarter came at the end of an 11-play drive, giving Northwestern a 13-10 edge.Duke committed two turnovers and had a punt blocked, while Northwestern (1-1) had two giveaways among its blunders.Murphy went 24-for-39 for 242 yards with three touchdowns and an interception.Northwestern quarterback Mike Wright was 20-for-36 for 158 yards and an interception. Porter gained 93 yards on the ground and scored two touchdowns.