Pakistan won their first of the five One-Day Internationals against Sri Lanka by six wickets here at the Pallekele International Cricket Stadium on Thursday.
Chasing an easy target of 135, set under D/L method, Pakistan completed the victory in 34.1 overs for the loss of four wickets.
Their main scorers were opener Mohammad Hafeez (37), young Umar Akmal (36 not out) and captain Misbah-ul-Haq (30).
Earlier, Umar Gul grabbed three wickets in a sharp opening spell as Pakistan restricted Sri Lanka to 135-8 in the day-night match, reduced to 42-overs-a-side due to rain
The fast bowler (3-24) removed skipper Mahela Jayawardene, Tillakaratne Dilshan and Dinesh Chandimal to send Sri Lanka reeling at 23-3 in the first nine overs
Gul was superbly backed by paceman Mohammad Sami, who dismissed Kumar Sangakkara and all-rounder Angelo Mathews in his first two overs to reduce the hosts to 41-5. He finished with 3-19 off six overs.
Lahiru Thirimanne, who added 50 for the eighth wicket with Nuwan Kulasekara (18), top-scored for Sri Lanka with an unbeaten 42 while extras contributed 31, the second-highest of the innings.
Thisara Perera (17) and Upul Tharanga (10) were the other batsmen to reach double-figures.
Sangakkara, who took 20 deliveries to open his account, made just nine runs before being trapped leg-before while Mathews was caught at first slip by skipper Misbah-ul-Haq for no score.
Off-spinner Mohammad Hafeez bagged two of the last three wickets to finish with an impressive 2-20 off 10 overs.
Gul struck in his third over when he had opener Dilshan (five) caught by Saeed Ajmal at mid-on and then trapped Jayawardene (three) leg-before in his next over.
The second one-dayer will also be played in Pallekele on Saturday and the last three games in Colombo on June 13, 16 and 18.
The one-dayers will be followed by a three-Test series starting on June 22.