Having won the toss, Sri Lanka opted to bat first but a batting collapse saw them restricted to 44 runs for 4 wickets at the end of first 10 overs.
However, Sri Lanka skipper Manudi Nanayakkara and No. 3 batter Limansa Thilakaratne resurrected the innings with an unbeaten 109-run stand for the fifth wicket.
Nanayakkara top scored with a knock of 74 runs off 40 balls with 10 fours and 2 sixes while Thilakaratne contributed with 41 runs off 46 balls with 4 fours.
In reply, the hosts made only 59/6 in the allotted 20 overs handing a massive win for the visitors. Hiruni Hansika finished with tidy figures of 2/2 in her 3-over spell.