Now Jadeja should get man of the match award and Chahal should receive the award as replacement.
Edit : Lol i guess its first time in the cricket history, where replacement player winning the MOM.
Concussion substitute option is just another one in the list of retarded innovations from the ICC. There should be additional terms to make sure that the teams doesn't use it for their advantage. In the end, it was like India was playing with 12 players against an 11-member Australia. And if Jadeja had bowled his 4 overs instead of Chahal, Australia probably could have won the match.