Australia has it's Institute of Sport which covers all sports. Tennis players get financial assistance from the Institute (Hewitt and Rafter both were funded in their junior days through the Institute), as well as the young players today. Tennis Australia is associated with the institute and runs programms in all Australian States. eg - head in NSW is Wally Masur.
The AIS Tennis program promotes excellence in tennis and is designed to complement and support Tennis Australia's national junior development program. Players are encouraged to work to their full potential in both their sporting and academic careers.
The program offers scholarships to Australian junior tennis players who have shown, both through their national results and their attitudes on and off the court, a willingness to strive to achieve their potential.
Here is a little detail re: Australian Institute of Sports Tennis programmes.
In addition to running a residential scholarship program, AIS tennis coaches are involved with Tennis Australia in conducting camps for talented young players. These camps are designed to let young athletes experience the environment of an elite program, and are used to identify potential AIS scholarship athletes. "
Link to AIS website re tennis.