76ers vs. Celtics: Past series results, memorable moments from one of NBA's oldest, most contentious rivalries | CBS Sports Headlines 76ers vs. Celtics: Past series results, memorable moments from one of NBA's oldest, most contentious rivalries Boston and Philadelphia have met in the postseason more than any other two teams … Continue reading 76ers vs. Celtics: Past series results, memorable moments from one of NBA's oldest, most contentious rivalries