When two athletes engage in combat sports, it typically is a competition of who out-alphas the other.
In the animal world, the winner would take over the pack, while the loser would be forced to leave.
Athletes would often clash due to primal personalities of dominating the other. This would possibly lead into bad blood and rivalries.
We have seen countless examples happen inside the cage, which would often spill to the outside.
Look at the top 15 most heated rivalries as presented by MiddleEasy...