Portugal sealed top spot in Group A3 and a place in the Nations League semi-finals after a hard-fought point against a wasteful Italy on Saturday.
The much-improved Azzurri had the best chances but were let down by their poor shooting on a tense night in Milan.
The draw means Portugal cannot be overtaken at the top of the group as second-placed Italians have played all four of their games while Poland are relegated.
Portugal, still without five-time ballon d’Or winner Cristiano Ronaldo, will play their last-four tie (and possibly the final) on home soil after Uefa announced that the conclusion of the inaugural Nations League would be played in the country, at venues in Porto and Guimaraes in early June 2019.
Portugal beat Group A3 rivals Italy and Poland to claim hosting duties, which is expected to be confirmed by Uefa’s Executive Committee at their meeting in Dublin on Monday 3 December – the same day that the draw for the finals takes place.