Italy, Poland and Portugal have all "expressed an interest" in hosting the finals of the first-ever UEFA Nations League.
They're top-tier Group 3 rivals in the new international competition - with only one of them able to make the semi-finals.
The semi-final and final matches will be held in June 2019.
A statement on uefa.com explained: "The finals will in principle be hosted by one of the group winners from League A.
"As Italy, Poland and Portugal form Group A3, and providing that all three associations submit bids which meet UEFA's requirements, the winner of that section is in line to be appointed to be the host by the UEFA Executive Committee in December 2018.
"The finals will be held in two stadiums with a net seating capacity of at least 30,000, ideally located in the same host city or (within) approximately 150km."
The decision will be made by European football's governing body in December.