Debutant Usman Khan Shinwari struck in his debut over for Pakistan, removing Sri Lanka skipper Upal Tharanga after Sri Lanka won the toss and decided to bat first in the fourth ODI at Sharjah.
Shinwari came in for Rumman Raees, while Imad Wasim made a comeback to the playing XI, replacing Fahim Ashraf.
Sarfraz and his men have already wrapped up the five-match series 3-0, recording their seventh consecutive win in ODIs and the ninth victory in the last 11 matches after defeating Sri Lanka on Wednesday. The defeat was Sri Lanka’s 10th in a row.
In the third ODI, a century on debut by opener Imam-ul-Haq and a career-best 5-34 by Hasan Ali helped Pakistan to beat Sri Lanka by seven wickets. Imam became only the second batsman from his country and 13th overall to score a hundred on ODI debut before he finally fell for 100 off 125 balls.
Imam had been brought in for opener Ahmed Shehzad, who failed to perform with the bat in the opening two matches of the series.
But on Thursday, Pakistan were dealt a blow when veteran all-rounder Mohammad Hafeez was reported for suspect bowling action for the third time.
Hafeez was first suspended from bowling in December 2014. He was allowed to resume bowling in April 2015 after an independent reassessment of his bowling tests found his action to be legal. He was suspended for a second time after an independent assessment revealed that he had employed an illegal bowling action after being reported in the Galle Test v Pakistan in June 2015.
The fifth and final ODI will be played in Sharjah on October 23. The two teams will also play three T20 internationals, the first two in Abu Dhabi (October 26 and 27) and the last in Lahore (October 29).