BOSTON—Takedowns and menacing gestures. Double technicals and flagrant fouls. And the Boston Celtics are heading to Atlanta to try to deliver the knockout punch.

Paul Pierce scored a playoff-high 22 points and Ray Allen hit three 3-pointers in the middle of the third quarter Wednesday night to turn back the Hawks’ last charge, leading Boston to a hard-fought 110-85 victory over Atlanta and giving the Celtics a 3-2 lead in the best-of-seven series.