Rivalries and feuds in mixed martial arts (MMA) are becoming increasingly popular these days, particularly in the Ultimate Fighting Championship (UFC).
Some of them are legitimate. Others are fabricated.
As the sport continues to grow and athletes realize having an enemy is ultimately good for their perception, seeing fighters form rivalries is going to become all the more common, especially when they realize it's possible to reap financial benefits.
On the most recent edition of "UFC Ultimate Insider" on FUEL TV, UFC color-commentator Joe Rogan counted down the top-8 rivalries in UFC history, which includes the likes of Nick Diaz, Brock Lesnar, Georges St. Pierre, Tito Ortiz, B.J. Penn and more.
Watch the video above and let us know in the comments section if Rogan got the list right or if your list of top UFC feuds of all-time would be different.