Following on from comments by top players, particularly Murray and Federer for the need of more blood testing, it looks as if ITF may be planning something. It's still quite vague, and they are making out it's something they were already working on, but they are also making excuses about resources, which isn't very compelling, so we'll see. However, it is at least a public acknowledgement that they should be doing more, and could see the introduction of biological passports.
This has been knocking about all day, so I'm surprised that no-one has posted about it yet, but then I remembered that most of the posters obsessed with doping seem to enjoy throwing accusations and complaining about everyone else being naive, and seemed more annoyed than pleased when some of the players started to take the subject seriously themselves.
Murray did say that there had been a lot more blood testing this year (2012), which he assumed to be associated with the Olympics, but being generous, maybe the ITF were hoping to get some kind of programme and a bit of data together before making grand announcements about stepping things up. Maybe they didn't want to make any announcement, because raising the issue only encourages people to think that it might be an issue.
IMO, ITF need to make a commitment to spending more money on quality and timely testing and aiming for biological passports sooner rather than later.
As far as I'm concerned, there's no evidence that doping is widespread in tennis, but equally there's scant evidence that it's wholly clean. It's never going to be possible to absolutely prove it, but for the sake of the (clean) players, they need to at least have data to refer to. If there were any clean cyclists during Lance Armstrong's hayday, they are going to suffer guilt by association through no fault of their own. It's about protecting the clean player's image as much as it is about keeping the actual game fair.
It's been talked about so much lately as being easy to dope that it's almost inviting underachieving players to think it's the next logical step. ITF need to make a stance now to make sure it's only a minority that think it's essential/worth the risk or doping in tennis could become a self-fulfilling prophecy.