Tried it once, scored 24, figured that's enough of an accomplishment for a weekend, and let it go at that.
http://www.mcsaatchi.webcentral.com.au/tennischallenge/optus_tennis_site_edited.html
Trick: keep it away from the sides.
http://www.mcsaatchi.webcentral.com.au/tennischallenge/optus_tennis_site_edited.html
Trick: keep it away from the sides.