England defeat won't halt Scotland progress - Andrew Robertson
Andrew Robertson insists defeat by England will not arrest the momentum behind Scotland and his own career.
The 21-year-old Hull City left-back scored in the 3-1 reverse in Glasgow.
"The campaign's the main thing," he said of Euro 2016 qualification Group D, with Scotland having beaten Republic of Ireland 1-0 on Friday.
"If you ask a fan would they have taken a win against England and not a win against Ireland, I don't think many would have said yes."
|Scotland left-back Andrew Robertson|
|"I think if we had played to our best, like we did on Friday, it would have been a much tighter game."|
It is only 18 months since Robertson was playing for amateurs Queen's Park in Scotland's bottom tier.
But he prefers to look forward rather than consider how far his career has come in such a short time.
And, despite finishing off a fine move to bring Scotland back to 2-1 at Celtic Park, the defender was critical of his own performance against players with whom he competes on a weekly basis in England's Premier League.
"Friday, I was pleased with my performance," the player sold to Hull by Dundee United this summer told BBC Scotland.
"Yesterday, I wasn't pleased with my performance, but that's the way football goes, you know your not going to play well every game, but I'm annoyed with myself."
Indeed, Robertson would relish another chance to get one over the Auld Enemy.
"It would be good to have the game on a more regular basis and hopefully the next time we can make a better account for ourselves," he said.
"The fans turned up in great numbers and they made a great noise, but we're annoyed that we disappointed them.
"It was a good friendly to have and you can't get a much better friendly than England, but I'm glad we got the three points on Friday."
Scotland manager Gordon Strachan had suggested that his players had been "spooked" by the atmosphere at Celtic Park.
"I don't know if it was the occasion, but I don't think so because the Ireland game was just as big an occasion probably and we dealt with that one, so I don't know what went wrong yesterday," suggested Robertson.
"I just don't think we got started and they got off to a really good start and they pressed us high up the pitch.
"We never really settled down and we didn't really do what we do best - get the ball down and play,
"We were playing too many high balls.
"We showed a few glimpses, but not enough to get a good victory."
Asked if the scoreline was proof of a gulf in class between the sides, Robertson added: "I think there was a gulf yesterday, but I don't know if there's a gulf overall.
"I think if we had played to our best, like we did on Friday, it would have been a much tighter game.
"But we won't know until we can perform to our best and they perform to their best."