Penguins versus Flyers, Yankees versus Red Sox, Rocky Balboa versus Apollo Creed; these are some of the greatest sports rivalries of all time. A rivalry is filled with competitions that have a sense of familiarity between opponents. Wins and losses are shared back and forth throughout years of history. Fans cheer loud when nemeses compete because emotions rise when the stakes are high. With a rivalry, bragging rights are sometimes more important than the trophy itself.