SCOTLAND captain Andy Robertson looked distraught as he was forced off injured against Northern Ireland at Hampden.
The Liverpool full-back now faces an anxious wait to determine whether he will be fit for June's European Championships in Germany.
A challenge with opponent Trai Hume in the first-half left the star in an uncomfortable state as he lay on the turf needing treatment before leaving the pitch..
It has not yet been confirmed how bad the injury is, but the former Hull City and Dundee United was devastated as he had to come off.
He was replaced by Bologna midfielder Lewis Ferguson.
It was a disappointing opening 45 for Steve Clarke's side as he saw his men go behind to a deflected effort by Northern Irish youngster Conor Bradley - Robertson's Anfield teammate.
And club boss Jurgen Klopp and national team gaffer Clarke will be hoping that the 30-year-old's knock is not too serious as he aims to help the Reds win the English Premier League and take Scotland to the knockout rounds of a tournament for the first time.
The national team went into this international friendly match in Glasgow without a win in six games as they prepare for the Euros in the summer where they will face Germany, Switzerland and Hungary.
A 4-0 drubbing by The Netherlands in Amsterdam on Friday night marked the longest win-less run of Clarke's tenure.
There were unsavoury scenes inside Hampden before Tuesday evening's match as both national anthems were BOOED.
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God Save The King, the anthem of Northern Ireland as well as England, was jeered by a section of the Tartan Army.
Travelling fans responded by giving Flower of Scotland a similar treatment as Clarke's men belted out their anthem.
Meanwhile, another one of the country's great sportsmen has also picked up an injury.
Tennis great Andy Murray hurt his ankle during a recent match, putting his final Wimbledon appearance in jeopardy.
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