Dier's excellent displays for Spurs in 2015-16 saw him become established as a fixture in England's midfield, although he could not prevent Roy Hodgson's side getting dumped out in the last 16 by Iceland in shock fashion in France.
The 22-year-old has struggled to recapture that form since his return to club football, although his cause has perhaps not been helped by Mauricio Pochettino taking advantage of his versatility to use him in defence to cover for the injured Toby Alderweireld.
"It is completely up to the manager where I play. What is more important is making sure I'm feeling good mentally," Dier said ahead of Sunday's Premier League trip to face Manchester United.
"That is more important to me. If I get back to that, where I have a good feeling and my confidence is back, then whatever position I am playing in, I will be able to play.
"I feel that I am getting it back - last weekend and against CSKA. I am just trying to get everything back to the levels of last season.
"It has been a difficult start for me this season - it has been there for everyone to see.
"It has been tough coming back late from the Euros because I haven't really been able to get going. Then I got injured a couple of games into the season and that halted me again. And when Toby got injured I played at the back again.
"This is football and these things happen to everyone. It has not been a catastrophe - it has just been a bit of a low start.
"I don't think there has ever been a really low point. It is just about getting back to where I want to be."