Fahey and Blatter after the ratification of the world anti-doping code last year
The World Anti-Doping Agency has warned world football's governing body Fifa that it will not get special treatment over the drug-testing of its players.
Fifa president Sepp Blatter opposes the 'whereabouts' rule, where players have to provide details of their location for one hour every day of the year.
And relations strained when Blatter called Wada a virtual police force.
But Wada president John Fahey said: "Fifa has no special concession in the area of whereabouts."
Fahey said all sports needed to give the whereabouts rule a chance.
"We acknowledge this particular standard is in its early stages and like anything in the code we are always interested in feedback," he said.
"We need to ensure that there is a proper examination of the code that everyone including Fifa signed up to before we start contemplating what should be changed.
"There are lots of things in sport or business that inconvenience us and these rules are to prove that we have clean sport.
"I think it's a small price to pay for the outcomes that we seek.
"Let's give it a good run and have a decent test with a proper time factor built in.
"I'm disappointed with Mr Blatter's statements, many of which are simply wrong. I have endeavoured to engage with him and I hope to do so in the next few days."
Blatter is against a rule he claims treats everybody as if they are guilty of doping.
He said: "We are in a situation in which all are accused. That doesn't fit my understanding of law.
"Every sportsperson is, in the sense of the WADA code, suspected of doping, therefore accused. That's not right in our society."
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