Oh at first i thought it's about the players who should hang themselves...
You know, the fact someone isn't winning slams, or is outside of top 10 where he used to stay in the past, doesn't mean someone is useless and can't make a living off tennis. This is when they can earn cash - as long as they're still relatively young - hard to blame them for that. Later they can be a coach or commentator... OK, Roddick, Nalbandian and Massu can be also VIP in their country and just enjoying the fame
In Massu's case we can see something Lapentti did, he extended his career a lot despite his health rejects, because of the tennis in Ecuador sake. Alright, even if he plays challengers yet for 2-3 years, how many Chilean players actually qualify on a challenger stage? Capdeville; at rare times Aguilar. Gonzo who is trying to come back on ATP stage is not that young either. Plus of course, there is still Olympics, Davis Cup.
Schuettler is schooling guys in challengers and despite his age, also on quick surfaces at the ATP level sometimes, he is surely more earning than spending now. Plus German tennis also sucks and Schuettler isn't really worse than their "young guns".
Roddick? Because he isn't top#5? He can still win on American soil the less significant events that are pumped there to the slam sizes and what else does he really need... Blake is sadly worse (used to like his style) but if he can beat the challenger guys in the US challenger than he can surely beat the same guys in a few rounds of the pre US Open hardcourt events. Or maybe he enjoys playing the lower stage where he attracts the people and is a star. Not that tiresome and still nice appearance money plus some on-court prize to that.
Nalbandian has a title this year, something most of not mentioned player don't. If he feels like playing serious tennis for 2-3 weeks a year than let it be for him.
Robredo was on a surprisingly high level before his injury, he should wrap it up when he comes back, certainly not the lethal no shape + reoccuring injuries combo.
JCF and Haas sadly have long problems that come back and they may not have enough of motivation even though Haas says he wants his child watch him play. Also - where is Paul Henri Mathieu?