Pakistan won by four wickets with seven balls remaining, finishing on 187/6 in 18.5 overs against Sri Lanka's 182/8.
Sri Lanka posted 182 for 8 in their full 20 overs, anchored by Lahiru Udara's 91 off 55 balls, including 11 fours and a six. PHKD Mendis contributed 23 and MD Shanaka added 18, while Naseem Shah claimed three wickets for 36 runs.
In reply, Pakistan reached 187 for 6 in 18.5 overs. Sahibzada Farhan led with 89 off 53 balls, hitting 10 fours and four sixes, and Maaz Sadaqat supported with a quick 50 off 29 balls. Fakhar Zaman added 21.
Pakistan's bowlers Eshan Malinga and Maheesh Theekshana each took two wickets, conceding 33 and 36 runs respectively.