Scotland boss Gordon Strachan has said that Wednesday's encounter with Northern Ireland is a friendly in name only as the British nations clash at Hampden Park.
The Scottish capital plays host as both sides take a break from their Euro 2016 qualification campaign to face off tomorrow night.
However, Strachan says that his troops' hunger for victory has not been diminished despite the jovial occasion.
"Looking at the intensity of the training, you got to the stage where you think 'calm down a bit'," he told a press conference. "People are telling me they are all tired, people are telling me they have played 40 games and they are running about non-stop.
"You actually have to stop the training because if you let them go on they would continue on another half-hour. I was asking players if they wanted to step out but no, they are not having it.
"If we can take what we had this morning into tomorrow, then I will be more than happy. I don't think they have even thought about this as a friendly. There will be an intensity to the game."
Third in Group D, the Scots host minnows Gibraltar in a Euro 2016 qualifier on Sunday, while it also gets serious for Michael O'Neill's men, who face off with Finland on the same day.
