Former marathon world record holder Wilson Kipsang has accused Kenya's athletics federation of smearing his name by disclosing that he missed an out-of-competition doping test.
The IAAF told Athletics Kenya it had tried to test Kipsang on November 11.
Athletics Kenya issued a statement saying no sanction would be imposed as it was his first missed test.
Kipsang, 32, said the statement was a "breach of privacy with malicious target to soil my name and efforts".
He added he would seek legal action against the "unprofessional misconduct" of Athletics Kenya.
|Wilson Kipsang's achievements|
|A two-time winner of the Frankfurt Marathon (2010 and 2011), he has also won the London and Berlin Marathons. He also claimed bronze in the marathon at London 2012.|
The federation said Kipsang was told he would be in violation of anti-doping rules if he misses three tests within an 18-month period.
Kipsang, who said he was aware of the IAAF notification, added: "I have submitted all necessary required details and the matter was settled accordance to the governing law."
He said he was in South Africa on the day of the test, attending a global athletics conference as the Kenyan and African representative.
Kipsang added Athletics Kenya was aware of his whereabouts.
"Missing unwillingly a single test for the first time cannot amount to issuing a press statement by a national federation," he said.
"I am not the only athlete who misses a test. I am not the first one in Kenya, neither in the whole world. Then, why Kipsang?"