India all-rounder Ravindra Jadeja was pulled out from the first T20I between India and Australia due to a concussion on Friday. 

Leg-spinner Yuzvendra Chahal took the field as Jadeja's concussion substitute after the left-hander was hit on the helmet while batting during India's innings at the Manuka Oval in Canberra.

 “Ravindra Jadeja was hit on the helmet in the final over of the first innings of the first T20I. Yuzvendra Chahal will take the field in the 2nd innings as a concussion substitute. Jadeja is currently being assessed by the BCCI Medical Team, ” BCCI wrote on its official Twitter handle.

Jadeja looked in fine form and played a brilliant cameo of 44 runs off 23 balls to help India post a total of 161/7 in 20 overs. 

After being hit on the helmet, Jadeja seemed fine and walked back to the dressing room.

Australia head coach Justin Langer was seen having an animated conversation with match referee David Boon on the sidelines but it was not known whether it had anything to with the decision to allow Chahal as a concussion substitute.

Here is the law regarding concussion substitutes:

"The ICC Match Referee should ordinarily approve a Concussion Replacement Request if the replacement is a like-for-like player whose inclusion will not excessively advantage his team for the remainder of the match.

"In assessing whether the nominated Concussion Replacement should be considered a like-for-like player, the ICC Match Referee should consider the likely role the concussed player would have played during the remainder of the match, and the normal role that would be performed by the nominated Concussion Replacement."