Ever since the UFC began back in 1993, the most successful company in the history of Mixed Martial Arts has so often been centred around legendary rivalries and brutal grudge fights. And so much of that success and what made those rivalries so special, is the simple fact that they were fights that fans were clamouring to see.
Giving an audience what they want is obviously a sensible business model, whether that's in the world of MMA or any other sport. If people are given what they're asking for, they'll happily pay hand over fist to see such things take place - particularly when it involves two of the best fighters in the world being afforded the chance to beat the absolute p*iss out of one another.
To focus on the UFC, the organisation has delivered so many iconic dream fights to its audience over the decades. There's no doubting just how special those battles feel in the build-up - even if the end result might not be the best.
On the flip side of seeing so many dream UFC fights over the years, there are those fights that fans were pining to see, but that ultimately never came to fruition. These are the ones which sadly never happened.