Sami Aslam walks off after being dismissed, Pakistan v Sri Lanka, 1st Test, Abu Dhabi, 5th day, October 2, 2017/AFP

ABU DHABI: Pakistan top order crumbled in the face of Sri Lanka bowling, after a brilliant five-wicket haul by leg-spinner Yasir Shah left Sarfraz XI needing just 136 runs to win on the final day of the first Test.

The seemingly easy target, however, soon loomed large as Sami Aslam (2), Azhar Ali (0), Shan Masood (7), Babar Azam (3) and Asad Shafiq (20) were sent quickly back to the pavilion.

Skipper Sarfraz Ahmed and Haris Sohail provided a much-needed anchor, taking Pakistan to 67-5 at tea after the early scare.

Earlier in the opening session today, pacer Mohammad Abbas bagged two wickets to take Pakistan within sight of victory on the final day of the Test.

Abbas dismissed Mendis and Lakmal within the opening hour of the morning session, getting the former trapped LBW for 18 and the latter caught in the deep for 13.

Shah starred with figures of 51-5. On Sunday, he grabbed the key wicket of Dinesh Chandimal to leave Sri Lanka fighting to avoid defeat.

Mohammad Abbas celebrates a wicket on final day of Abu Dhabi Test/Getty Images

It was tough to negotiate spin on a fourth-day Sheikh Zayed Stadium pitch, but despite a 32nd Test five-wicket haul for veteran Sri Lankan spinner Rangana Herath, Pakistan posted 422 to take a slender three-run lead.

Sri Lanka had made 419 in their first innings.

Herath´s 5-93 in 40 overs were well foiled by a brilliant 76 by Test debutant Haris Sohail, as initially, it looked as though Sri Lanka would take a first-innings lead.

Pakistan then hit back in the second innings through Shah, who first had opener Dimuth Karunaratne caught for 10 and then dismissed first-innings centurion Chandimal, caught at slip, for seven.

Sohail followed his responsible knock by claiming Kaushal Silva´s wicket, whom he trapped leg before for 25, while part-timer Asad Shafiq had Lahiru Thirimanne for seven.