Sprinter Lalit Kumar, who ran solo in the 100m final at the Delhi Athletics Championships in September after seven other competitors pulled out on hearing the presence of NADA officials, has failed a dope test, according to officials. It is learnt that Kumar's urine sample collected after the race on September 26 has returned positive for a banned steroid. Eight runners had qualified for the 100m final at the Jawaharlal Nehru Stadium but seven disappeared apparently after hearing that dope testers from the National Anti-Doping Agency (NADA) were present at the competition venue to take urine samples.