Niroshan Dickwella was unbeaten on 42, having added 66 runs for the unbroken fifth-wicket stand alongside his captain.
The left-hander was run out for 93 however helped his group recuperate from a precarious 61/three to succeed in 227/four at shut after Sri Lanka received the toss and batted on a greenish Sheikh Zayed Stadium pitch.
Karuna- ratne added a useful 100-run partnership with skipper Dinesh Chandimal, who was 60 not out at stumps, as Pakistan failed to interrupt by with the second new ball.
Niroshan Dickwella was unbeaten on 42, having added 66 runs for the unbroken fifth-wicket stand alongside his captain.
Chandimal was given leg earlier than to Yasir Shah on 42, a choice which was overturned on evaluation. His innings has included six boundaries whereas Dickwella hit 5 fours and a six throughout his aggressive knock.
Shah returned figures of two/59 however did not get a lot flip from the pitch whereas seamer Hasan Ali took 1/58.
It was Karunaratne’s knock that introduced Sri Lanka again into it within the final two periods. He batted for 4 hours and 40 minutes throughout an stubborn keep on the crease, recording his fourth half-century towards Pakistan and sixth total. However he was run out within the final session as he tried a fast single solely to be left stranded after Chandimal despatched him again.
Scores: Sri Lanka 227/four in 90 overs (Karunaratne 93, Chandimal 60, Yasir 2/59) vs Pakistan.