  The play-offs of the UEFA Euro 2020 qualifying tournament determine the last
four participants in the UEFA European Championship 2020. 16 teams, which have
failed to obtain a slot in the qualifying group stage, will be selected and
divided into four paths of four teams each based on the inaugural season
2018-19 of the UEFA Nations League. We provide a critical examination of the
relevant UEFA regulation and show that its articles contradict each other and
allow for an unfair formation of the play-off paths: it might happen that all
conditions cannot be satisfied simultaneously and a group winner might face
stronger opponents than a non-group winner from the same league despite its
better performance in the UEFA Nations League. Simple and straightforward
solutions for both problems are suggested.
