Brandon Knight had 19 points and 14 assists in the Pistons' 93-79 win over the Celtics in Summer League action on Thursday.
Austin Daye chipped in 15 points, eight rebounds and five blocks, while Khris Middleton had 12 points. Andre Drummond had 10 points and eight rebounds.
Kris Joseph and JaJuan Johnson led Boston with 17 points apiece.
Jared Sullinger had 11 points and seven rebounds.