According to ESPN article Boxing is the Most Difficult Sport

i play tennis and its not that tough.

This is new and exciting

Golf slightly harder than cheerleading.

Doesn't included Aussie Rules football so article is null and void.

Boxing is literally human chess. Of course it's the most difficult sport on this planet. Add in the fact that if you make a wrong move, you can literally get permanent damage to your body. And unlike other sports, no substitutions, and no injury breaks. You get hurt, or are tired, tough luck. There's a science to not blowing your load in the ring and pacing yourself. That's why a guy like Manny is an anomaly.

I found this article it may be old but nonetheless interesting. Its ranking sports in 10 different categories to decide the degree of difficulty in each one. Boxing comes up ranked at 1 with Ice Hockey at 2. Heres the link: http://sports.espn.go.com/espn/page2/sportSkills This is a good thing to keep in mind when calling some fighter a bum or what not I agree. Why is Hockey #2 lol wouldn't it be something like MMA getting kicked in the face and such

I've participated in 7 different sports on a organized level, none of them came close to how hard boxing was, which is why I fell in love with it.