SOUTH BEND, Ind. – Freshman Paolo Banchero scored 21 points, with 14 coming in the second half, and No. 9 Duke held Notre Dame to 27.9 percent shooting in a 57-43 win Monday night at Purcell Pavilion. Classmate AJ Griffin added 13 points, and he along with Banchero and graduate transfer Theo John each grabbed nine rebounds to help the Blue Devils (18-3, 8-2 ACC) hand the Irish (14-7, 7-3 ACC) their first home loss of the season. The 43 points allowed marked the fewest Duke has given up to an ACC opponent since a 68-40 victory against Clemson on Jan. 8, 2013. Duke won its fourth straight on Mon…