2) Boston Celtics vs. Philadelphia 76ers
The Boston Celtics slot in at No. 2, but this time, their rivalry with the Philadelphia 76ers gets the focus. Boston and Philly have gone back and forth for decades, and the rivalry remains strong even today. Not only did Bill Russell and Wilt Chamberlain's battles take place between the Lakers and the Celtics, but the two legends had multiple showdowns while Chamberlain was with the 76ers. In addition, Larry Bird and Julius "Dr. J" Erving kept the rivalry intense during their battles. The rivalry lives on as Philadelphia and Joel Embiid continue to chase the Celtics.