Amir was cleared to bowl on Saturday having left the field a day earlier, but managed just three overs before limping off. Wahab Riaz took a little over seven and a half minutes to bowl the 111th over of the Sri Lankan innings after pulling out of his run up five times.
Amir left the field in the afternoon session due to a shin injury that will prevent the paceman from bowling in the second innings and keep him out of the one-day global series. But the team management didn't opt for a scan.
This is the sixth day-night Test with a pink ball since Australia and New Zealand played the first at Adelaide in December 2015. Dickwella played important role like first test.
Leg-spinner Yasir Shah was the pick of bowlers with 2-90 while Amir returned figures of 1-59.
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The FIR claims that the Sri Lankan left-arm spinner, who became the first bowler to take 100 wickets against Pakistan, was seen inside the hotel rooms of the Pakistani batsmen late at night. Yasir, who had to do the bulk of the bowling, especially in Mohammad Amir's absence, continued to leak runs despite fetching a lot of turn from the surface.
The moment Sri Lanka went after him, starting from Sadeera Samarawickrama on the opening day, Pakistan simply had nothing to fall back upon.
With skipper Dinesh Chandimal perishing early after going past his fifty in the first over of the day, Sri Lanka chose to be positive in their approach.
Starting off the day on 254/3, Sri Lanka only added 28 runs to their overnight score before captain Dinesh Chandimal was given out lbw off the bowling of Yasir Shah for 62, which came off 195 balls and included six boundaries. The tourists have put themselves in a great position to pull off an unprecedented series win.