Australian’s love tennis. Our open spaces to accommodate tennis courts and excellent climate to play all year round have contributed to the high participation and spectator numbers. Five per cent of Australians over the age of fifteen participate in tennis, either as an organised sport or recreational activity. Australia hosts the first of the four Grand Slam events of the International tennis calendar year, the Australian Open. The Australian Open was first held in Melbourne in 1905 and is now attended by over 700,000 fans each year.