"Sporting is my home. I played here from the age of eight to 20. It will always be my home," said the 29-year-old defender, speaking on the sidelines of the Web Summit.
Specifically regarding a return to Portuguese territory, Eric Dier left the door ajar: "Yes, one day.
"I'm still going to talk to my wife about it, but I'm certainly going to move back here. I want to live here in Portugal when my career is over, but I don't know if it's to play yet.
"But in football, you never know.
It's worth remembering that, after several seasons as Tottenham's figurehead, the centre-half has fallen out of favour since the arrival of Ange Postecoglou, making just two appearances this season.