the same reason why you play sports!
to entertain yourself and have fun with friends!
tennis is a sport that people play in australia
Approx: 50-85% play sports in Australia.
58.64%
Cricket
They play sport together
Cricket
Together with Cricket, it is one of the most widely played games in Australia, and there are extensive clubs for younger people (both boys and girls) promoting the sport.
Tennis - men's tennis.
Rugby
If you are asking if there is a sport in Australia that is also popular with other nations then the best answer would be cricket
If you want to play e-sport, Infinite people can play this game across the glob.
A large amount of people play AFL (or aussie rules) in the winter. there is also a lot of people play Rugby Union, Rugby League and Football/soccer.