And it is being claimed that Vogts will be told by his bosses to keep any disparaging remarks about his players behind closed doors in future.

Vogts had said after Wednesday's defeat by Denmark that versatile McNaughton, who was taken off at half-time, was too nervous during the first 45 minutes.

It was the second time that the German coach had made such a suggestion about the 19-year-old.

The latest incident, which has angered the player and team boss Ebbe Skovdahl, has led Aberdeen chief executive Keith Wyness to contact Vogts' paymasters.

Wyness said: "I spoke to the SFA to voice our concern and displeasure at the comments.

"However, I have agreed to keep the details of the discussions private."

The SFA has insisted that it was always Vogts' intention to replace McNaughton with Celtic's Stephen Crainey at half-time.

Yet McNaughton had playing in an unfamiliar central midfield role, while Crainey was brought on in his usual wide left position.

McNaughton said: "I didn't feel nervous at all and I can't understand why he came out and said I looked nervous.

"It wasn't just me who couldn't get to grips with the game, but I have to accept I didn't play as well as I know I can.

"It was certainly disappointed that I didn't get out for the second half."

Even so, he added: "The manager talked to me about my body language and I will try to work on his advice."

There have been newspaper claims that Vogts will be "carpeted" by the SFA for his public remarks about the player.