[rkmsuf]

All the tennis players became golfers.

That and you have all the younger 'stars' either retiring or pursuing other things(Williams sisters).

The Andy Roddicks and James Blakes of the world spend a big chunk of time overseas playing and just aren't at the forefront of the youth sporting world. Tennis is only an interesting TV product once a year....the US Open. And even that timing is terrible considering summer is wrapping up and all the fall sports are starting.