Celtics and 76ers will extend their long playoff history with a Game 7 showdown in Boston
BOSTON (AP) — The Celtics appeared to be advancing to the second round of the NBA playoffs after a 32-point road victory in Game 4 in Philadelphia. But the 76ers’ convincing back-to-back victories in Game 5 and Game 6 have left a Boston team that once seemed favored to emerge from the Eastern Conference on…