^ I think its unfair targeting certain players for doping without any evidence, esp when they have never skipped a test, or tested positive earlier. It also creates a lot of rancour and backlashes in our forum.
Is this bold statement or sheer ignorance? With some famous cyclists has already shown it's possible to receive performance enhancing treatments or drugs for years without getting caught by conventional methods of testing, it takes courage to believe those conventional screening tests can do their job. Not to mention ITF replaced it with new Passport system which can catch abusers without failing drug tests because they found it ineffective. Imv past record of tests has little significance, since if Top cyclists can afford that then I'm sure top Tennis pros can too. While past record of lower pros has some significance Imv since it's little difficult for them to manage all this financially and for having less chances to be covered by ATP/ITF if caught.
About skipping tests, be sure that athletes who spends months away from competition receives much lesser tests than pros in competition. Data shows 15% of total tests carried out off competition in 2012. Even if one gets off competition test, they can drill hole in system further filing TUE for healing joint injuries and receiving P.E. substances without fear of getting caught since they gets free pass for those substances he received for healing purpose.
Player repeatedly files TUE and receives substances through different unproven treatments for healing joints, spends months away from competition, performs much better than before without any recovery period which generally needed for those having real injuries is Top suspect in my opinion. Little bit off topic stuff, sorry for that.
In case you refer to Nadal, he has always had injury issues even prior to this BP (bio passport) thing. His injuries are nothing new.
In any case, there are plenty of other players Fed is vulnerable to now, so it's really going to be a bolt from the blue if he can squeak one in.
No particular player, I just want clean sport with no unfair advantage to Top pros or those abusing holes. I'm even OK with it if new system catches Nishikori or my other favourites or even Federer.
I just believe for Federer with stricter anti doping measures winning major tournaments little easier, this is true for others too.