The incident occurred in the 22nd over of Sri Lanka's innings, when Gunathilaka, batting on 55, played the ball down into the pitch and ran a few steps out of his crease before deciding against the single when he saw the bowler, Pollard, haring towards the ball in a run-out attempt. In his effort to regain his crease, however, Gunathilaka trod on the ball and deflected it away from Pollard, leading to a furious appeal. It wasn't clear from replays whether Gunathilaka had deliberately foiled a run-out attempt, but TV umpire Nigel Duguid ruled in the bowling team's favour.
The incident drew strong reactions on social media.
Gunathilaka said Pollard came up to him after West Indies' win to have a chat about the incident.
"He apologised, he told me he didn't see that properly at that time and only after he saw the video he realised I didn't do anything," Gunathilaka was quoted as saying by NewsWire.
Sri Lanka, who lost the T20I series against the hosts, will play the second of the three ODIs on Friday and the third on March 14, following which they are scheduled to play two Tests in Antigua.