When the Celtics were winning their eight straight titles in the 1960s, they defeated Philly in the playoffs in six of those years. Those losses were made worse for Sixers' fans when they had to watch Red Auerbach light up his cigar after the Celtics had secured a key victory.
Despite his scoring records, dominance of the game and rule-changes made to equalize his power and size, Wilt Chamberlain toiled for years in the shadow of Bill Russell when it came to this team rivalry.
And it was only fitting that it was the Sixers who eventually ended the Celtics' string of championships.
Let's take a look back at some of the memorable moments of this rivalry.