Scotland fans travelling to Ljubljana via Frankfurt for the game against Slovenia have been issued with a warning.
New manager Sebastien Pocognoli takes charge of his first game in the Nations League on Saturday and the Tartan Army are already travelling across in their droves.
Many are travelling with a stop off in Frankfurt, Germany on the way and some have been met with a problem.
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It has taken some four hours to get through passport control, causing them to miss their conneting flight to Ljubljana.
Journalist Calum Crowe wrote on social media: "Any Scotland fans travelling to Ljubljana via Frankfurt, give yourself as much time as possible for your connecting flight.
"I was 2hrs 45mins to get through passport control and security at Frankfurt.
"Have spoken to others who were more than 4hrs and missed their connection.