7. Floyd Mayweather Vs. Manny Pacquiao: MGM Grand, Las Vegas, May 2, 2015
Simply put, we couldn't put this too high as it hasn't taken place. Even though it should be one of the best fights of all time, it could still disappoint fans of pure boxing. Even though it isn't in either of the fighters' nature, we could be put through a tactical bout that flatters to deceive. Let's hope not. Nevertheless, it is sure to be one of the most lucrative bouts of all time. That we can be sure of. The fight is expected to gross $400 million. Phwoah! Money Mayweather has been a champion in five weight divisions and is undefeated in no less than 47 fights. Pacquiao, a congressman in the Philippines didn't you know, is a world champion in eight divisions. Both men are sure to go down as all-time greats in the sport, but who will rank higher? Everything is on the line for the pair.