Are there any sports in the olympics where each country can enter a player?

Question

It always seems that each sport has only a few countries competing, obviously because there was some sort of qualifying procedure in the three previous years. Are there any sports where any country can submit a player?

Answer 1

these are the finals, all countries can enter the qualifiers, but only the top ones go to the big show. Do you really think mexico would not have sent a soccer team to the Olympics? they did not qualify .