Yadav’s tests from when he was not competing had come back with a positive result and he had attended a hearing to put his case in front of the anti-doping disciplinary panel on Saturday.
Yadav had secured a berth at the games for India by winning a bronze medal at the last year’s world championship in Las Vegas. According ot him, he has undergone around 25-30 drug tests in his whole carreer as a professional freestyle wrestler which spans over 15 years.
"I have come out clean every time and never have any of my samples returned positive results," he said in a statement.
"I have undergone three tests in the last month and a half.
"I appeared for a dope test on the second of June before leaving for a training camp in Bulgaria. I was again tested on my return on the 25th of June and once again on the fifth of July."
Yadav's Olympic berth was put in jeopardy when Sushil Kumar, who won bronze in the 66kg category in Beijing in 2008 and silver in London, moved up a weight and sought a court order for a bout between the pair to determine who should go to Rio.
Last month, Delhi high court had cleared the way for Yadav to compete in Rio Olympics by deciding in his favor. This created a big row and Yadav was given police security at the Sports Authority of India training centre at Sonepat which is a rare occurrence.
"I believe that there is foul play involved in this entire episode," said Yadav, who won gold at the 2010 Commonwealth Games in Delhi. "Someone has sabotaged my food supplements and water intake.
"I am a responsible athlete with an understanding of the country's expectations and hopes on me. I would never dream of betraying that hope."
NADA Director General Navin Agarwal confirmed that the wrestler's room mate and training partner, Sandeep Yadav, has also tested positive for the same substance, which Indian media has reported to be the banned anabolic steroid methandienone.
"The foul play allegations are out of our jurisdiction," Agarwal told Reuters by telephone. "It's for the local police to investigate
