Long distance runner Vishwakarma's A sample tests positive By Navneet Singh ( IANS) | Published on Tue, Mar 16 2021 18:36 IST | 7 Views National Anti-Doping Agency.. Image Source: IANS News New Delhi, March 16 : Uttar Pradesh's long distance runner Sunil Vishwakarma's bid of making it to this year's Tokyo Olympic Games seems to be crumbling after he tested positive for banned substance, said a national level coach. The 'A' sample of the 23-year-old athlete has tested positive for Erythropoietin (EPO), a performance enhancing drug banned by the World Anti Doping Agency (WADA). A NADA team had collected 10 urine samples during the eighth National Race Walking Championship held last month in Ranchi. Of these, one athlete has failed the dope test.