[Ruehe]

This is a question which I have seen a lot recently and I think it is impossible to answer. Personally, I believe that soccer is most difficult to get to the highest level ( European 1st division leagues) due to the number of people who play the sport. However sports like, boxing require an immense amount of strength, coordination, and mental strength. What do you think?

[MEHMEH696]

Martial arts in general. Specifically karate

[olichan12]

Mental skill: Chess.
Physical skill (conditioning): Soccer.
Physical skill (strength): Powerlifting.
Physical skill (strength plus conditioning): American Football.
Physical skill (agility): The various Martial Arts.
Physical skill (speed): Sprinting.
Physical skill (flexibility): Tie between Gymnastics and Ballet.

[Ruehe]

I absolutely agree with chess, as fair and skill based as it gets for a sport.

[Jibnowski44]

Each take a lot of different skills