The Boston Celtics notched a satisfying win in Detroit on Sunday, handing the slumping Pistons their sixth straight NBA defeat just two weeks after losing to them in Boston. Al Horford led the way with 18 points, nine rebounds, and six assists. Kyrie Irving added 16 points and Marcus Smart and Jaylen Brown scored 12 apiece for the Celtics, who held the Pistons to season lows in points scored and field goal percentage in the 91-81 triumph. “I wouldn’t call it payback,” star point guard Irving said. “It’s just always good when you can respond the way you want to, especially on their home floor, just like they did on our home floor.”