After a five-match winless trot, Marco Materazzi's men finally registered a crucial victory to keep their hopes alive of qualifying for the semi-finals.
Talented India international Jeje Lalpekhlua netted the opening goal in the dying moments of the first to give Chennaiyin the much-needed lead.
Veteran Italian striker, David Succi, who was inducted into the playing XI after a long time, scored the second goal to seal the fate of the match.
Here are some photos from the match between Chennaiyin FC and FC Pune City:
Indian striker Jeje Lalpekhlua celebrates after scoring the first goal for Chennaiyin FC.
Jeje Lapekhlua celebrates with teammates
India international Jeje Lalpekhlua celebrates with his teammates after scoring the first goal.
Chennaiyin FC captain Bernard Mendy played an inspirational role in his team's win.
Veteran Italian striker David Succi scored the second goal of the match to guarantee all three points to Chennaiyin FC.
David Succi celebrates with teammates
David Succi celebrates with his teammates after scoring the second goal for Chennaiyin FC.
All images are take from the Indian Super League official Twitter handle.