India led 2-0 at half time against Tajikistan through goals from captain Sunil Chhetri but then let in four goals in the second half to lose the match. An out-of-sorts Indian defence crumbled into pieces and undid all the good work done in the first session.
Former Croatia defender Stimac was appointed coach on a two-year contract last month after Englishman Stephen Constantine walked away from the job in the wake of the team's exit from the group stages of the Asian Cup.
Igor Stimac, who as a coach has guided Croatia to the 2014 World Cup, believes that the entire footballing fraternity of the country should be brought together to make the national football team a force in the continent.
Vishal Kaith, Germanpreet Singh, Nandha Kumar, Redeem Tlang, Bikramjit Singh, and Sumeet Passi are the ones who have been released ahead of the King's Cup, to be held in Buriram, Thailand from June 5-8.