The UEFA Nations League is off and running again as 54 European nations look to make a bid to rise up the rankings.
Two-time champions Portugal are looking to defend their title, Spain and France are looking to regain the crown, and England are looking to win the competition for the first time.
But how does it all work? ESPN takes a look...
How does the Nations League work?
The Nations League is divided into four tiers: A, B, C and D, with the best teams, like Spain, France and England appearing in the A tier.
Within those tiers, teams are divided into four groups of four teams each (two groups of three teams in tier D).
Each team plays every other team in their group home and away, with the top two teams from each of the A-tier groups entering into the playoffs -- a straight knockout mini-tournament which decides the Nations League champion for the season.
The teams which finish bottom of their A-tier, B-tier and C-tier groups are relegated to the division below, with those who finished top in groups B, C and D are promoted to take their places.
Similarly, the nations which finish third in A, B and C face off against the teams finishing second in the group below, in a relegation playoff.
Those games are played alongside the knockout stages during the March and June international breaks.
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Why does performing well in the Nations League matter?
First of all, the Nations League offers European national teams a chance at silverware in between World Cup and European Championship years -- try asking fans who were at Portugal's penalty-shootout win over Spain last year whether the competition really matters.
But, even for sides who are unlikely to win the tournament, doing well can be a huge step towards national glory.
That is because the Nations League offers a back door into the upcoming Euro 2028 in the UK and Ireland.
The top four performing sides in the 2026-27 Nations League who have not qualified for Euro 2028 directly through the qualifying stage will face the four worst runners up from traditional qualification.
It was a similar situation for Sweden at this summer's World Cup, as the Scandinavian side entered the playoffs through the Nations League and went on to beat Poland and book their place in the United States, Mexico and Canada.
Graham Potter's side made it to the round of 32 before they were beaten 3-0 by France.
