Andy Robertson was understandably frustrated as he was forced off injured during tonight's Scotland vs Northern Ireland match. 

The two UK nations met in a friendly at Hampden Park this evening, as the first international window of 2024 came to a close.

As the first half headed towards an end, the national team skipper rolled his ankle after a collision with Brodie Spencer. 

And with the title race on for Liverpool in the season run-in, and the European Championships coming up this summer in Germany, there's no doubt the captain faces an anxious wait to find out the extent of the knock.

Robertson was replaced by Lewis Ferguson as the Scots switched to a back four.

Steve Clarke is expected to provide an update on the captain's situation after the game.

It comes as Northern Ireland's national anthem was loudly booed by a section of the Scotland fans at Hampden tonight.

God Save The King played over the sound system at the national stadium as both teams lined up prior to the friendly game in Mount Florida.

And ahead of the Euro 2024 warm-up match for Scotland, the home faithful made their feelings clear about the visitor's national anthem.

READ MORE: God Save The King booed by Scotland fans vs Northern Ireland

Audible boos were heard from the stands as the Northern Ireland players sang the song with their coaching staff and fans.

It's not the first time this season that God Save The King has been booed. When England defeated the Scots 3-1 at Hampden in September last year, the anthem was met with the same response.

Flower of Scotland rang out around Hampden, as the small band of Northern Ireland fans repaid the favour with the jeers.