We played with three centre-backs and used our full-backs like wing-backs.
The German giants were hoping to make their move in the January window but Pochettino insists he is staying at White Hart Lane having only signed a new contract four months ago.
Speaking to reporters ahead of this weekend's meeting with Burnley at White Hart Lane, the Spurs boss has reiterated that Dier has never once aired his grievances over his current role at the club.
"I never heard from him that he wasn't happy".
"When he was playing as a midfielder, a centre-back or a full-back, he never came to say to me I'm not happy to play there, or any other position".
"We are talking about rumours so it's too hard to say things".
"Like all the young players, sometimes you can use him in a different position but his quality means he is a player that can play in different positions and that is very important for every coach".
"We'll see in the future which position can give his best football but for me he's a player that can play as a centre-back, a midfielder, sometimes like a full-back".
"I think this season we've played 16 games in Premier League, he was in the starting XI 14 times".
"To build strong values and principles for his career". He's a very good prospect, a talented player.
"Can he be captain here one day?" I always remember my first official game, he scored [against West Ham].
After being left on the bench in Tottenham's 1-0 defeat to Manchester United on Sunday, the former Sporting academy graduate returned to the Spurs starting XI on Wednesday as his side secured a comfortable 3-0 win over Hull City.
Pochettino also confirmed Mouse Dembele (foot) and Vincent Janssen (ankle) will be assessed on Saturday.
"Absolutely no", Pochettino said when asked if Dier could leave Tottenham, according to Goal. "He's improving a lot in ten days since Argentina but too early to say if he'll be ready for Southampton".