One of my favorite sport: tennis

A. Is a complete sport
1. Is physically demanding
2. Is a global sport
a. Professionally tennis is too much demanding because you should have a good skills and great abilities
b. All year the tournaments are held in different places of the world like: France, Australia, United States, England.
i. In this sport there are excellent players like: Roger Federer, Novak Djokovic, Andy Murray, among others.
ii. This players are in great shape they are the best players in the world actually.
B. There are very important tournaments.
1. These important tournaments they call: Grand Slams!
2. There are a qualifying stage and guesses.
a. There are just only 4 grand slams: Australia open, Roland Garros in France, Winbledon in London and US Open.
b. In every tournament they have to earn points to compete for first place in the ATP(Association of Tennis Professionals)
a. Actually the ranking of ATP is: in first place, Roger Federer; in second place: Novak Djokovic; third place: Rafael Nadal.
i. Federer is the best player in the world: actually he is a legend living because he have won many grand slams on the history of tennis.