Sri Lanka were bowled out for 446 in their first innings against Pakistan on the fourth day of the Rawalpindi Test on Thursday, taking a 12-run lead as debutant Saqib Khan claimed seven wickets.
Sri Lanka resumed innings on Day 4 at 404-4 but lost their remaining six wickets for 42 runs.
Dhananjaya de Silva top-scored for Sri Lanka with 167 runs, while Kusal Mendis contributed 119.
Saqib Khan claimed seven wickets for Pakistan, while Mohammad Abbas took two and Razaullah picked up one.
Sri Lanka dominated Day 3 as Dhananjaya and Mendis showed great staying power as both posted centuries to lift Sri Lanka to 404-4 at the end of play.
Mendis became the first Sri Lankan to score a century in his maiden Test as captain, after taking the reins from De Silva before this series.
Their stand is a record for Sri Lanka against Pakistan, improving upon the 207 by Thilan Samaraweera and Tillakaratne Dilshan in Lahore in 2009.
De Silva, lucky to be dropped on 38 by Saud Shakeel off pacer Razaullah, took full advantage of the reprieve and has so far struck 20 boundaries in his 246-ball knock.
De Silva cracked a boundary off spinner Arafat Minhas to complete his 14th Test hundred, fourth against Pakistan and second at the venue.
Mendis brought up his 11th century with a ramp boundary off Razaullah.
Kamindu completed his eighth Test fifty before edging Abbas to wicketkeeper Ghazi Ghori to leave Sri Lanka 155-4.
The second Test is also in Rawalpindi starting November 17, having been shifted from Lahore due to poor weather.
— With additional input from AFP
