Here is how I see it.
1 The top tennis players dope. With the combination of weak testing, high level of performance in recent years and money at stake, it is almost inconceivable that someone could challenge for a GS title in 2013 without doing what has to be done.
2 You do not know how much each one dopes. The fact that you like Federer and want to suck his **** does not mean he dopes less than Nadal because you dont like him.
To make assumptions on specifics and quantities of player doping products is NOT the same as to make assumptions on the simple yes or no question of - do they dope. It requires far far far more information and unless you work in the anti doping business or the pro doping business, you CANNOT know that.
Its exactly the same as the Boonen fanboys who after finding out about Ibraugen starting moaning - oh we know Cancellara dopes more because he attacks further out, so its ok.
3 You do not know how each one dopes unless its a proven method. Inject epo is a simple thing thousands of athletes have done. Fake injury is a lot more complicated and there is no real record of it so you cant just say - oh look, this player was injured, i think he dopes, the 2 things must be related.
4 With the money tennis players have and the proven record in the sport (with Aggasi and I think Rusedski) of covering up positives to save the business, why the **** would Nadal or Murray need to fake an injury to dope?
No TDF winner needed to fake an injury. Nadal, Murray, Djokovic have 50 times more fame, money, profit potential, fans, national interest etc than Froome will ever have. They compete in a sport with 50 times less drug testing.
It makes no sense. Why wouldnt they just dope. Thats what I dont understand. Why not just take the drugs and move on.
5 Not everything a doper does in their life is related to their doping. If one of the top 4 tennis players had a car crash tomorrow it wouldnt mean they were speeding away from a doping ring or that they were under the influence of doping products.
Life goes on just as normal for someone who has taken epo in the morning as for someone who hasn't. You cannot read into everything you hear about a tennis player and interpret it as having anything to do with match fixing or doping.
An athlete dopes in the morning and they may not think about it at all until the next time they do it.