"I hope I can prove that I am a clean athlete in every way possible".
"I would not want to ruin all I have worked for since my first global race in 2007".
It would be a serious blow to Kenyan athletics if it is confirmed that 28-year-old Kiprop, one of the biggest names in the country's stellar cast of middle-distance athletes, has tested positive for the endurance-enhancing drug erythropoietin (EPO).
Rosa said he was traveling when the story broke and that he has since been trying unsuccessfully to speak to his athlete.
Kiprop won Olympic gold in 2008.
A Standard report said that a "high-profile runner" who has "dominated world championships over the years" was embroiled in a doping scandal.
In 2016, a Nairobi Court terminated a doping case against Federico on grounds the State needed time to investigate the matter.
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Efforts to get information from Anti-Doping Agency of Kenya (Adak) proved futile as Japhter Rugut failed to answer our calls.
"The process to determine the allegations is on going and it takes time and AK at this moment can not confirm or deny the same".
Three years ago, Kenya was rated "non-compliant" by the WADA before being reinstated prior to the Rio Olympics.
Korir said they can only discuss other doping matters in general terms.
"AK has no mandate whatsoever to test or get samples from athletes". The sample was taken in an out-of-competition test late in 2007.
Three-times Boston Marathon champion Rita Jeptoo and Olympic marathon champion Jemima Sumgong, also managed by Rosa, were among around 50 Kenyans who have failed doping tests in the last six years.