The National Anti-Doping Agency (NADA) conducted random dope tests on four footballers after Dempo Sports Club's 11th round I-League encounter against Sporting Clube de Goa.
Sameer Naik, Clifton Gonsalves (both Dempo), Keita Boubacar and Rowan Pereira (both Sporting) were all asked to submit their urine samples immediately after the match at the Nehru stadium in Fatorda on Thursday, according to Sporting Clube de Goa manager Angelo Albuquerque.
The tests are being conducted across the country as per the guidelines of the Asian Football Confederation (AFC) and a player could face a ban of two years if he fails the dope test for the first time.
This is the first time the footballers have been tested in this edition of the league.
Earlier, Mumbai FC footballer Nishant Mehra was banned for two years by the AIFF after both his samples tested positive.