But sometimes, it’s complicated. So spare a thought for Danish Red Anton Hagelund, who tonight will be urging Denmark on at Euro 2020, as they try to reach their first international final since 1992.
To do that, his nation will have to overcome three Manchester United favourites – Harry Maguire, Marcus Rashford and Luke Shaw – who could all represent England on the pitch.
It brings up some conflicting emotions for Anton, who is a member of the Scandinavian Manchester United supporters’ club, but he’s clear where his allegiances lie ahead of the game at Wembley!
“I'm really excited,” says Hagelund.