Under which principle was David Warner replaced in the Test match against India?

Substitute players are common in other sports like football, hockey, but in cricket this rule has come up recently and its use is rarely seen.

In the ongoing second Test match between India and Australia, an ICC rule has been implemented which allows one player to play in the middle in place of another player.

The ICC's rule, called the 'concussion' rule, saw Australian opener David Warner sidelined for the rest of the game while another player, Renshaw, replaced him.

This information was given in a tweet from the official Twitter handle of ICC. Also, instead of Warner, now Matthew Renshaw will play the rest of this match.

What is the connection principle?

Under this rule, a player can withdraw from the rest of the match if he is no longer mentally able to play and concentrate after a concussion. In such a case, another player may be allowed to play the rest of the match.

Prior to the World Test Championship, the ICC defined the concussion substitute principle as: traumatic brain injury caused by biomechanical forces. This usually results in neurological deficits in the brain that resolve spontaneously, while other clinical symptoms sometimes appear over time.

A concussion does not cause any structural damage to the brain, but it can cause serious clinical symptoms and functional disturbances in the brain. It is therefore a potentially serious injury with risks of short- and long-term health problems such as CTE, dementia, etc.

According to the rule of the substitute player formulated by the ICC, the player of the team who is out can play, that is, if there is a batsman, then the batsman, and if there is a bowler, then the bowler will come in his place.

In such a case, if a player is an all-rounder, he will not be able to bowl.

For example, if Babar Azzam gets injured, Shoaib Malik can replace him but he cannot bowl because Babar Azzam does not usually bowl and Shoaib Malik is an all-rounder.

David Warner could only score 15 runs on the first day of the second Test at the Arun Jaitley Stadium in Delhi on Friday. During this time, he faced 44 balls, many of which seemed to hit his helmet and body.

Sports journalist Adesh Kumar Gupta told BBC Urdu on phone that the debate on the role of substitute players in cricket is very old but its implementation has been delayed compared to other sports.

According to sports journalist Adesh Kumar Gupta, this rule was first introduced before the World Test Championship in 2019. Earlier in New Zealand and England, substitute players were used in the form of connections in domestic cricket.

He said that earlier during the Ashes series in 2019, Smith was hit on the head by Jofra Archer's ball and could not continue the game and was replaced by Marence Laboshan in the Test. He also batted in the last innings.

But yesterday, a ball from Mohammad Siraj hit Australian opener David Warner on his elbow and another ball on his helmet. It was not a serious matter at the time, but the next day, the ICC announced that Warner had suffered a concussion and that a replacement player would represent Australia in the remainder of the second Test.