Mohun Bagan Super Giant defeated Chennaiyin FC 1-0 after Manvir Singh scored a header off a cross from Liston Colaco in the 85th minute.
Chennaiyin FC missed an opportunity to equalize when Ramon Andrade de Souza volleyed out with the final kick of the match.
Mohun Bagan accumulated six points from three rounds in the Indian Super League following the hard-fought home win.