I was reading a book on statistics (The Drunkard's Walk) and there was a section where the author posits that the tests for banned substances in athletes are rife with false positives, and test technicians don't understand the underlying math involved. Some are guilty, some are likely not.

James Barnett, seattle, USA

if you want to clean up cycling, it's pretty simple. if a rider tests positive, the team is banned from uci racing for 2 years. then the team becomes responsible for keeping their riders clean. they're the only ones with enough access to do so.

Chris Hyams, Austin, TX, USA

This news doesn't put me off le tour at all, if anything it's a much cleaner and more fair race than we've seen in the last decade or more - I'm starting to beleive again !

James Bodroghy, Adelaide, Australia

All Le Tour riders were tested just before the start of the race. This resulted in certain suspicious riders being targetted later during the race. The organisers of the tour and others in cycling do far more on drug testing than in an other international sport. Olympics EPO testing is a joke .

Le , Sydney, AUST

It will be interesting to see if the French allow Saunier Duval to return next year. Astana was not allowed to race this year even after compleatly restructuring the team, thus Contodor was not allowed to defend his title. Of course Astana wasn't a French team!

john davis, vinita, USA

Here we go again!
Sport is full of freaks,people with unfair advantages and cheats.
Sad.

james allen, manchester, england

What's with the ridiculous conspiracy theories? If anything damages the image of cycling, it's these ridiculous posts.
This is the closest tour for years, which is as good a sign that the sport is being cleaned up as any.

Dave, Reigate,

Only one answer to this to get the Tour some credibility. Test everyone the day of each stage, with no one testing positive being allowed to race. Takes much more manpower, but it's the only answer. Perhaps they can set up kits ahead of time to minimize the delay.

Jerry Parshall, Washington, DC, USA

Hy ken,

I'm french.

In france, There is a doubt about the french rider Christophe Moreau.
And many french rider were condemned in the past

ast, lyon, FRANCE

I'm done!

For years I have looked forward to The Tour and followed every stage excitedly. I'm going to miss Liggett & Sherwen who are arguably the best sports commentators on the planet.

What used to be the most amazing sporting event in the world now makes me sick.

Bob Porter, Grand Rapids, USA

Test French riders?? Why bother? Have you looked at the standings?

Ed P. Oring, Camden, USA

One can only conclude that the authorities need to test each rider to see if he is himself a dope!

gino francesco, hastings, england

Ask the organisers why so few French riders are being tested??

Ken Wood, Fleet, UK