The midfielder featured against Spain, but insists he will be keeping his head down rather than getting carried away.
The midfielder was called up into the international squad this week, after a series of impressive performances for Spurs this season during their strong start.
Those have come in a defensive midfield role, with him having quickly adapted to his new role after playing most of last season in various defensive roles.
He and the national side didn’t enjoy the best of days against former world champions Spain, but he says it was a dream come true regardless of the result.
“It’s one of the aims you set out to achieve when you start your career so to have achieved it so early is a dream come true and a very proud moment for me and my family,” he told tottenhamhotspur.com.
Spain are a fantastic team with lots of players that I looked up to growing up. It doesn’t get much tougher than Spain and that is what you want to test yourself against both as a team and as an individual.”
Given the lack of quality currently available to manager Roy Hodgson in midfield, there is certainly an opportunity for players to stake a claim in the side.
Dier, and Spurs teammate Dele Alli, another breakout start this year, are certainly among the contenders, having made it into the squad for this international break.
The duo must be careful however, as they do not want to let the hype surrounding them ruin the opportunity in front of them, as has happened in the past.
And Dier insists he will just get his head down and keep going, opting to sit down and think about it once he has retired.
“It’s all happened so quickly, I haven't really had a chance to sit back and think about it all yet,” he added
“I prefer to just put my head down and keep going. I’ll have a lot of time to think about it when I’m retired!”