UEFA Nations League

The UEFA Nations League was unanimously adopted by the 54 member associations at the XXXVIII Ordinary UEFA Congress in Astana on 27 March 2014. The competition mostly replaces international friendly matches that are played on the FIFA International Match Calendar.
The tournament starts in 2018. The 55 competing nations (Kosovo had since become a UEFA member association) are split into four leagues (A, B, C and D) based on their UEFA ranking at the end of the 2018 World Cup qualifiers in November 2017. Within those four leagues, teams will be split again into groups, which will be made up of either three or four teams.
The Nations League will take place across six matchdays, with double-headers during international breaks in September, October and November 2018.
Within each league, four teams will be promoted at the end of the cycle, while four teams will be relegated. They will then play at their new level in the next competition which will begin in 2020.
The winners of the four groups in League A will qualify for the Final Four competition.
The Final Four is the finale to the Nations League. It is scheduled for June 2019 with the group winners from League A, B, C and D facing each other. There will be a one-game semi-final stage followed by the final. The winner will be named as Nations League champion.
The Final Four tournament will occur in odd years so, in years when there isn't a World Cup or European Championships, there will be a Nations League champion.
Euro qualifiers for 2020 will commence in March 2019, with double headers in the March, June, September, October and November international breaks.
There will still be some space in the calendar for friendlies, especially for the top teams, who are in groups of three within League A and B and the top group in League C.

UEFA Nations League 2018-19 League Phase draw was made on 24 January 2018 in Lausanne.
LEAGUE A
Group A1: Germany, France, Netherlands
Group A2: Belgium, Switzerland, Iceland
Group A3: Portugal, Italy, Poland
Group A4: Spain, England, Croatia
- Four group winners play-off for the UEFA Nations League trophy in June 2019
- Four sides that finish bottom of groups relegated to League B for 2020 edition
- Top four-ranked League A teams that do not qualify for UEFA EURO 2020 enter play-offs in March 2020, with one EURO finals place on offer
LEAGUE B
Group B1: Slovakia, Ukraine, Czech Republic
Group B2: Russia, Sweden, Turkey
Group B3: Austria, Bosnia and Herzegovina, Northern Ireland
Group B4: Wales, Republic of Ireland, Denmark
- Four group winners promoted to League A for 2020 edition
- Four sides that finish bottom of groups relegated to League C for 2020 edition
- Top four-ranked League B teams that do not qualify for UEFA EURO 2020 enter play-offs in March 2020, with one EURO finals place on offer
LEAGUE C
Group C1: Scotland, Albania, Israel
Group C2: Hungary, Greece, Finland, Estonia
Group C3: Slovenia, Norway, Bulgaria, Cyprus
Group C4: Romania, Serbia, Montenegro, Lithuania
- Four group winners promoted to League B for 2020 edition
- Four sides that finish bottom of groups relegated to League D for 2020 edition
- Top four-ranked League C teams that do not qualify for UEFA EURO 2020 enter play-offs in March 2020, with one EURO finals place on offer
LEAGUE D
Group D1: Georgia, Latvia, Kazakhstan, Andorra
Group D2: Belarus, Luxembourg, Moldova, San Marino
Group D3: Azerbaijan, Faroe Islands, Malta, Kosovo
Group D4: FYR Macedonia, Armenia, Liechtenstein, Gibraltar
- Four group winners promoted to League C for 2020 edition
- Top four-ranked League C teams that do not qualify for UEFA EURO 2020 enter play-offs in March 2020, with one EURO finals place on offer.