Soccer
NFL
soccer! is the number one sport in the world
Football (soccer) is by far the world's number one sport.
hockey
soccer is the number one sport in the world
Football or American Soccer.
The number one spectator sport is NASCAR .
Yes; played in nearly every country.
It is American football even though it is number one in America, and growing in popularity outside the US, soccer is still the world's best sport.
Considered by some as a sport but not all, the Nascar Circut draws more in attendance than any other competitive sport. American football is second, followed closely (due to the length of the season) is baseball.
Yes there is. Soccer is a huge sport in Italy. It has many professional teams. The top Italian soccer league, Serie A, is one of the best in the world. Italy is one of the top nations in soccer.
It is not possible to determine who the number one cyclist in the world would be because cycling is not a consistent sport. While there are many great athletes in the sport, it varies depending on the course and the weather. This being said, many considered Lance Armstrong to be the best until he was stripped of his titles for drug use.