PITTSBURGH — Ben Hansbrough had 19 points and seven assists and Carleton Scott 16 points and nine rebounds, and No. 15 Notre Dame upset No. 2 Pittsburgh 56-51 on Monday to snap the Panthers’ 20-game home winning streak.
Scott went 5-for-6 from three-point range to help the Fighting Irish (17-4, 6-3 in the Big East) earn their first road victory of the season. Scott Martin made three three-pointers and added 10 points for Notre Dame, which shot 49 percent from the field and held Pittsburgh (19-2, 7-1) to 40 percent.
‘‘This was the absolute road challenge for us,’’ Irish coach Mike Brey said.
Notre Dame has won three consecutive games against the Panthers, but it picked up its first victory at the Petersen Events Center. Pittsburgh had won 51 of its previous 52 home games.
Gilbert Brown scored 13 points and Brad Wanamaker 12 for the Panthers, who suffered their first conference loss of the season.
The Irish trailed 28-23 at halftime, but Hansbrough made a jumper with 9:25 left to tie the score at 39. That kicked off a 9-2 spurt for Notre Dame that Scott capped with a four-point play, making a three-pointer as he was fouled by Pittsburgh’s Ashton Gibbs.
Wanamaker made a layup to trim the Irish’s lead to 54-51 with 1:28 left, but Hansbrough scored in the final seconds to help Notre Dame hang on.
‘‘This is probably the best win I’ve had — maybe ever,’’ Hansbrough said.