"It was a good boost for me because while I might play for Scotland on Wednesday night, it could be a while before I could play for Newcastle.
"I want to keep in there and keep playing. I have to gradually prove to the gaffer that I'm worth a regular place.
"It was great to get on again and get another victory, though missing Manchester United is a tough pill to swallow. Hopefully, I'll be back at Old Trafford in my career and it's just one of those things.
"You make a decision to help the team by handling on the line and it backfires. You've got to be man enough to stand up and say it was a bad decision."
Check out our head-to-head record against Man United