How many tennis opens are there?

Related questions

1. What religion is Djokovic?
2. How much money does a tennis ball boy make?
3. Which tennis surface is the hardest?
4. How many Masters does Federer have?
5. Who is the highest paid male tennis player?
6. Does Rafael Nadal have a sister?
7. Is there a dress code for Wimbledon spectators?
8. Who has won all Masters 1000?
9. Which Masters 1000 has Federer not won?
10. Does Roger Federer have a child?

Tags

1. #tournaments
2. #praise
3. #season
4. #there
5. #desire
6. #championships
7. #french
8. #players
9. #grand
10. #tennis
11. #wimbledon
12. #australian