They are also likely to be without senior batsman Lahiru Thirimanne, who is suffering from a back problem and might be replaced by the uncapped Sadeera Samarawickrama.
Dickwella attacked Yasir and struck five fours to add some impetus to the innings, Sri Lanka moving on to 355-4 at tea with the composed Karunaratne easing past 150 and reaching the 3000-run mark at Test level.
Yasir was the pick of the bowlers with two wickets, while Amir chipped in with one. That leaves Pakistan in a spot of bother to square the series after losing the first Test by 21 runs in Abu Dhabi and, more importantly, save its seven-year unbeaten series record in the United Arab Emirates.
Wahab has looked considerably less incisive than Hasan Ali, who got injured after the first Test in Abu Dhabi, and his ridiculously long 19th over was about the only highlight for him in Dubai apart from Dimuth Karunaratne's dismissal'.
And facing a tricky spell of batting towards the end of the day, Shan Masood and Sami Aslam navigated 18 overs for Pakistan to give them some hope going into the third day.
PAK vs SL, 2nd Test Day 1 Live Cricket Score Streaming, Ball By Ball Highlights 6th October 2017:- Pakistan has never lost a Test series in the UAE since the team made its debut on 2010.
Sri Lanka lose three wickets against Pakistan as the match continued in the second session on day one of the day-night second Test at Dubai's International Cricket Stadium on Friday.
There is so much to play for in the second and final Test in Dubai.
Amir, 25, aggravated an old problem in his right shin during the opening day's play after bowling just three deliveries of his 17th over.
The pink-ball Test, the sixth in all since Australia and New Zealand played the first such game in Adelaide in 2015, will also be a new experience for the Sri Lankan.
However, the pink ball will test the visitors to some extent as they have never played an global day/night test before.
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