Five teams have advanced to the round of 16 at the European Championship on a day they were not in action, while a COVID-19 case has caused a headache for two competing nations.
France, England, the Czech Republic, Sweden and Switzerland all are assured of advancing because they have four points and will finish no worse than third in their groups.
Results in the final Group B and C games on Monday have left Finland and Ukraine in third place in the respective standings with three points.
That means any nations with four points are guaranteed to be at least among the four best third-place teams.
Finland and Ukraine have not yet been eliminated.
Results in Group D on Tuesday and Group E on Wednesday could leave those third-place finishers with only two points.
Should teams be level on points, the tie-breaking criteria is: 1) Goal difference 2) Goals scored 3) Wins 4) Lower disciplinary points total 5) European Qualifiers overall ranking.
Meanwhile, England players Ben Chilwell and Mason Mount are isolating after coming into contact with Scotland midfielder Billy Gilmour during Friday's match at Euro 2020.
The Scottish Football Association announced on Monday morning that 20-year-old midfielder Gimour had returned a positive COVID-19 result and would miss Tuesday's crunch Group D encounter with Croatia.
Gilmour helped boost Scotland's qualification hopes with a man-of-the-match display in Friday's 0-0 draw at Wembley, where he interacted with Chelsea teammates Mount and Chilwell.
The England squad, including Chilwell and Mount, all tested negative on Monday.
Asked about the duo's availability for the group decider, England manager Gareth Southgate said: "Well, we don't know at the moment.
"There's obviously got to be quite a doubt, but there's still a lot of discussions and investigations going on behind the scenes, so at the moment they're isolating and we just have to find out over the last 12 hours or so."
Australian Associated Press