There's something incredibly beautiful about two men stepping inside of a ring, staring down each other from opposite sides while the crowd cheers and the announcer screams their names to the thousands in attendance. They all know what's going to happen, they all know what's about to go down. These two human beings are about to show off their technical prowess, athleticism, power and, most importantly, toughness to see who the better fighter is. However, as wonderful as that is - and it sure is wonderful - a lot of the time it's just business, and nothing more. However, sometimes when the styles match up right and the determination between both competitors to beat the other is on a level normal human beings simply cannot begin to fathom, truly brilliant battles between fierce warriors can occur which, in turn, bring out the sort of emotions in people that no other sporting event could even dream of doing. It's simple. Sometimes two individuals punching each other in the face and refusing to back down to one another can be the most exciting thing on the planet and can galvanize millions of fans around the world. Currently fight fans everywhere are highly-anticipating the five-years-in-the-making, upcoming battle between Floyd Mayweather Jr. and Manny Pacquiao, so to celebrate their soon-to-be scrap here are 10 of the best boxing feuds to ever occur in prizefighting.