Eighteen-year-old Rehan Ahmed admitted he could not sleep the night before his England debut but finished the day with two wickets as Pakistan were bowled out for 304 in Karachi.
Rehan Ahmed showed why he had been hailed by Ben Stokes and Brendon McCullum throughout England's series in Pakistan with two wickets on his Test debut as the hosts were bowled out for 304 on day one in Karachi.
Teenage leg-spinner Rehan Ahmed will become England's youngest men's Test cricketer when he takes to the field in the third and final game against Pakistan.