You must not watch much tennis then. There have been plenty of Aussie teenis players since then.
1 guy in the top 100 in the world. bernard tomic at 59th who I've never heard of before
http://www.atpworldtour.com/Rankings/Singles.aspx
edit: and he's not even a real australian. born in germany
Todd Woodbridge and Mark Woodforde are the most successful Wimbeldon men's double's champs in history.