FIFA is investigating Domagoj Vida's conduct after the Croatia international allegedly made anti-Russia comments following his side's quarter-final win against the World Cup hosts.
Vida was on the scoresheet with an extra-time header as Croatia triumphed on penalties following a thrilling 2-2 draw in Sochi on Saturday, booking a semi-final clash against England.
But the Besiktas defender could be sanctioned prior to that game with FIFA looking into comments he seemingly made in a social media video.
Appearing alongside former Croatia international Ognjen Vukojevic - with whom he played at Dynamo Kiev - Vida said: "Glory to Ukraine.