Rangers are sweating over the availability of Borna Barisic after Croatia team-mate Domagoj Vida tested positive for Covid.
The 31-year-old played 45 minutes against Turkey on Wednesday night before being withdrawn at the break in a pre-planned substitution.
Vida had been tested on Monday and been cleared to play but the results of a second test came back during the match and indicated that he had tested positive.
Barisic did not make it off the bench in the friendly but Rangers will be fearful of a similar outbreak to the one that hit Celtic hard over the last international break.
Vida has been isolated from the rest of the squad ahead of their match with Sweden.
A statement from the Croatian FA said: "The medical service of the Croatian national team received initial information at the end of the break between the two halves that there was one potentially positive result. This is a common test procedure, and a 'suspicious' finding is retested to confirm the result.
"As at that time the coach Zlatko Dalic had already made the decision to change Vida, the medical service of the national team isolated Vida according to all epidemiological measures until the confirmation of the test results.
"Vida will, in accordance with regulations, spend the next few days in self-isolation in Istanbul.
"All other national team members and staff members, who tested negative, are scheduled to travel to Stockholm. It is taken into account that the national team complied with all epidemiological measures, in accordance with UEFA 's Return to Play protocol."
