Bangladesh Debutant Yasir Ali was on Monday replaced by Nurul Hasan as concussion substitute in the second innings of the first Test against Pakistan at Chattogram.
The batter was struck on the helmet by Shaheen Afridi's short ball during the second innings and informed about uneasiness before a concussion was conducted.
The team management said that Yasir will be taken to the hospital for scans.
''We have opted for Nurul Hasan as concussion sub of Yasir Ali,'' BCB chief selector Minhajul Abedin told Cricbuzz.
''We are having a look at him now and we had the taken the concussion test as he informed us that he is not feeling well,'' he said.