The 25-member Olympic core group will undergo mandatory quarantine before the commencement of training. New Delhi: The Indian women hockey's core group will return to the national camp in Bengaluru on Sunday to restart the preparations for the Tokyo Games after a 10-day break. The 25-member Olympic core group will undergo mandatory quarantine before the commencement of training. In January, the team toured Argentina where it played seven matches against the home country's junior, B team and the senior side, ranked number two