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 .
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.
Yes; played in nearly every country.
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.
Jim Courier is associated with tennis. He used to be the number one professional tennis player in the United States. He started his professional tennis career in 1988 and retired in the year 2000.