Here’s everything you need to know before the tournament gets under way…
Who’s been called up?
City are the joint-best represented club in the England squad, with four players selected by Gareth Southgate.
Fabian Delph, Raheem Sterling, John Stones and Kyle Walker have all been included.
Bernardo Silva will also be involved with Portugal.
The Netherlands and Switzerland are the other two nations to have qualified for the tournament.
What’s the tournament format?
With only four teams, there will be a straight knockout system of two semi-finals followed by a final and a third-place playoff.
Should the games be level at full-time, 30 minutes of extra-time will follow, before a penalty shootout, if the two teams still cannot be separated.
When and where are the games?
Portugal are the host nation and all four games will be played at either the 30,000 capacity Estádio D. Afonso Henriques in Guimaraes or Porto’s Estádio do Dragão.
Bernardo will be the first City player in action when the hosts face Switzerland in Porto on Wednesday 5 June, with kick-off at 7.45pm*.
England take on the Netherlands a day later in Guimaraes and that game will get under way at 7.45pm.
The same city will host the third-place playoff on Sunday 9 June at 2pm, while the final will take place on the same day at 7.45pm in Porto.
*All kick-off times are in British Summer Time (BST).
Can I watch on TV?
In the UK, Sky Sports will be showing all four games live and ITV will broadcast the highlights.
Which rules are in place?
Goal-line technology and VAR will both be used in the Nations League Finals.
Should any games go to extra-time, teams will be allowed to make a fourth substitution.
What are the City players’ chances?
City’s England quartet go into the tournament with confidence.
The Three Lions are ranked fourth in the world, the highest of the participating teams, while Bernado’s Portugal were the only finalist to go unbeaten in the group stage and will be buoyed by the backing of the home crowd.
What else should I look out for?
Sterling needs one more cap to bring up a half-century for England.
Delph, with 18 caps to his name, could also reach an appearance milestone if he was to feature in both games.