World Cup winners France, Eden Hazard's Belgium and a fast-improving Netherlands under Ronald Koeman could all book places in the finals of the Nations League in matches between Thursday and Tuesday.
The competition, UEFA's bid to move away from meaningless friendly matches, has divided opinion in its inaugural season.
The strongest sides will qualify for the finals next June, but all 16 group winners will get a place in the Euro 2020 qualification playoffs.
However, if those nations have already qualified for Euro 2020 through normal qualifying, the best-ranked team from a lower group will be drafted in.
Qualifying for Euro 2020 does not begin until next March.
France on brink of qualification
================================
"We are going there for the win," coach Didier Deschamps warned. "We are the world champions and we will behave like it."
Not the Germany of old
======================
Belgium keeping form
====================
Croatia seek revenge on Spain
=============================
Love it or loathe it
====================
Disclaimer: No Business Standard Journalist was involved in creation of this content