batsman was ruled out of the final day of the second Ashes Test after being diagnosed with concussion caused by a blow to the neck from England’s Jofra Archer.

Smith was forced to retire hurt on 80 on Saturday afternoon, but passed concussion tests and returned to bat to make 92.

The 30-year-old had further tests on Sunday morning, which showed “some deterioration”, said.

He is set to be replaced by Marnus Labuschagne, who becomes Test ’s first concussion substitute and can bat in ’s second innings.

Smith, who did not field on the fourth evening, will continue to be monitored before the third Test at Headingley starts on Thursday.

Under ’s concussion protocol, there is no minimum amount of time a player must wait before playing again, although a statement said the “short turnaround to the next Test is not in his favour”.

Smith, player of the match after making 144 and 142 in ’s first-Test win at Edgbaston, is third in the International Council Test batting rankings.

England, trailing 1-0 in the five-match series, began a rain-delayed final day on 96-4 – leading by 104.

As well as having his fitness assessed on a continuing basis, Smith will also have a scan on his neck on Sunday.

Smith was struck just below the left ear by a 92mph delivery during a sustained spell of hostile bowling from England debutant Archer, who touched speeds of 96mph.

Former captain Smith wanted to continue batting, but left the field for medical tests – which he passed – allowing him to resume his innings 40 minutes later.

When he returned, he appeared to be rattled, first swiping at Chris Woakes, before offering no stroke to be lbw to the same bowler.

Speaking on Saturday evening, coach Justin Langer said it was entirely Smith’s decision to continue batting and it was made with him having satisfied all medical criteria.

In confirming that Smith had been ruled out of the match, said it was not uncommon for players to pass initial tests, only to display symptoms of concussion between 24 and 48 hours later.

“Steve was closely monitored by medical staff overnight,” read a statement. “This morning he reported after sleeping well he woke with ‘a bit of a headache and a feeling of grogginess’.”

can replace Smith under new ICC rules on concussion substitutes, which are in place for the first time in this series.

A player must be replaced like-for-like – for example, a batsman for a batsman – and the substitute must be approved by the match referee.

said: “Despite the unfortunate nature of what has happened, the positive is that the concussion protocol, including the availability of the concussion substitute, has served its purpose.

“A player is no longer under pressure to take the field when he or she displays symptoms of concussion and a side is not disadvantaged having lost a player to a blow to the head or neck.”


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