I always wonder which martial art is the most effective in a 1-vs-1 street fight without weapons. After doing some research I came up with 3 types of positions (maybe there are more) someone can hold during a fight.
My logic tells me this:
STANDING: the most effective would be Muay Thai or Boxing.
CLOSE DISTANCE: one should consider to wrestle.
GROUND GAME: Finally on the ground you better use your grapple / BJJ skills to survive :p.
So in my opinion you have Muay Thai or Boxing, Wrestling & BJJ or some grapple art (luta livre).
UPDATE:
This type of questions are asked by many. It's better to avoid this kind of situations, but sometimes you just have to be prepared. Some people maybe living in a dangerous environment. Some people don't know which martial art they should practise to be prepared. So the answer for my question should help people in making the correct decision. I'm not trying to underestimate any martial art, but let's face the reality and think logical.