Not that Dier needs any social media advice.
The 26-year-old spent lockdown putting the finishing touches to a social networking app he founded with brother Patrick and friend Zoe Connick that encourages users to share their favourite spots, such as restaurants, cafes and hotels.
“We think it’s something everyone can relate to,” says Dier, who has most of his Spurs team-mates using ‘Spotlas’.
“We’re putting that word-of-mouth experience, where you might ask friends or family for places to go or someone from a city or country you’re visiting, on to a platform to make it a lot easier for people to be able to find the best places in any city they go to.”
Working on the start-up has presented difficulties, especially during a global pandemic, but Dier has enjoyed overcoming those challenges and having a project to focus on.
“Patrick and Zoe have worked night and day, every day, for the past two years and have put in so much,” he adds. “Obviously football is a lot of my time, but we meet every week and discuss new ideas and everything surrounding the app.
“To see the final product, have it on your phone and experience using it has been incredible.”
It has given the former Sporting Lisbon player, who has also been studying for a degree in social sciences through the Open University, a taste for future developments.
“I completed my first year and then Spotlas came in and took over,” explains Dier, who is already considering another app. “For me, it is really important to have different things to focus on outside of football.
“It’s nice to have that distraction and be working on and learning different skills. The app has definitely given me that. I have learned so much doing it – how to manage different situations, working with a start-up and everything that comes with that. I have enjoyed that whole process.”
Come Sunday, however, his focus will be on maintaining Spurs’ spot at the top of the league and welcoming 2,000 fans at the Tottenham Hotspur Stadium for the first time since March.
“We are really excited for that,” says Dier. “For the few that do manage to come, it will be a nice change and hopefully the start of some normality.
“We have been very lucky in the sense we have been able to continue doing what we love. I’ve been trying to remember that as much as possible.
“To be able to come to training every day and still play matches is incredible.”