Australia and all secrets

The tennis is a sport in solo. The aim of the game is to put the ball in the camp opposing. The tennis has compresed four big tournament who call : Open of Australia in Melbourne, Roland-Garros in France, Wimbledon in London, US Open in New York.Those tournament are very hard has win. Only bests players can at participate. The 1st player in the world is : Novak Djokovic (Serbian)