Scotland defender Kieran Tierney has left the squad after sustaining a head injury against Ireland and will miss its Nations League clash with Ukraine on Tuesday, his club Arsenal said on Sunday.
The 25-year-old, who has represented Scotland 34 times, picked up the injury during its 2-1 win over Ireland in the Nations League on Saturday.
"Our defender is back as a precaution after being substituted due to sustaining a head injury whilst playing for Scotland in their UEFA Nations League fixture against the Republic of Ireland," Premier League Arsenal said in a statement.
Arsenal did not say when Tierney could return to the pitch.
Scotland leads Group One in League B with 12 points from five games, two points ahead of second-placed Ukraine.