The Celtics and 76ers will meet Saturday night in Boston for Game 7 of their Eastern Conference semifinal series, a single elimination that determines which team continues toward the NBA championship and which concludes its season. According to CBS Sports, the central stakes are binary: advance or be removed from contention. Philadelphia forced the decisive game by winning Game 6 at home, but the scheduling gives Boston the advantage of its own arena. The franchise that wins this contest secures a berth in the conference finals; the loser exits the playoffs entirely. No further margin for error exists. The outcome rests on which team executes in the final moments of a series that has already swung between both cities. One locker room will hold a season’s postmortem while the other prepares for the next round.