How does the Nations League work and who is in each league?

Portugal (twice), Spain and France have all won the men's Nations League [Getty Images]The 2026-27 Uefa Nations League campaign starts on Thursday.The competition began in 2018, and the format sees each nation compete across four different divisions.Each side competes for promotion and relegation in every campaign, with the best-performing nations in the top league going on to reach the play-offs at the end of each campaign.The best-performing nations in each Nations League campaign can also str