1982 Eastern Conference Finals –
76ers win 4–3
Third straight postseason meeting. Boston led 3–1 after Game 1 (121–81 “Mother’s Day Massacre”), but Philadelphia rallied with wins by Andrew Toney (30, 39) and Maurice Cheeks. Game 7: Toney 34, Cheeks 11 assists; 120–106 win. First 76ers series win over Celtics since 1959
Sporting News.
1985 Eastern Conference Finals –
Celtics win 4–1
Boston swept Philadelphia in Boston, led by Larry Bird’s triple-double in Game 1
Wikipedia.
2002 Eastern Conference First Round –
Celtics win 3–2
Boston won in seven games, including a 92–82 road win in Game 7
StatMuse.
2012 Eastern Conference Semifinals –
Celtics win 4–3
Boston came back from 3–1 down to win Game 7 in Philadelphia
Wikipedia.
2018 Eastern Conference Semifinals –
Celtics win 4–1
Boston swept Philadelphia in Boston
Wikipedia.
2020 Eastern Conference First Round –
Celtics win 4–0
Boston swept in Boston
Wikipedia.
2023 Eastern Conference Semifinals –
Celtics win 4–3
Boston won in seven games, including a 112–88 Game 7 in Boston
LandOfBasketball.com.
2026 Eastern Conference First Round –
76ers win 4–3
Historic comeback: Boston led 3–1, but Philadelphia won Games 5 and 6, then Game 7 in Boston (109–100) to clinch the series. First 76ers playoff series win over Celtics since 1982
NBA+2.