Salman Butt, the Pakistan vice-captain and opener, was admitted to hospital early this morning with suspected gastroenteritis.
Talat Ali, the Pakistan manager, said Butt experienced severe pain in his stomach late last night and a decision was taken to take him to hospital early this morning.
"He is still at the hospital. He was on a drip initially but the doctors suspect gastroenteritis."
No word was forthcoming on whether or not Butt would take the field at any stage but Yasir Hameed has taken his place in the field. This is Butt's first Test for Pakistan in over a year and is also his first as vice-captain.