The final round of group action starts today with Group A wrapping up. Poland plays Czech Republic and Russia plays Greece. All four teams are still alive with Russia only needing a tie to secure their advancement. A tie in that game would also mean the Czechs could advance with a tie.
Contrary to popular belief, the first tiebreaker in this tournament is actually head-to-head. That means Greece would possess the first tiebreaker if they end up tied with only Russia. The only way that happens is if Poland can beat the Czechs, as a three-way tiebreaker would then go to goal-differential in this case as all three teams would have 3 points in their three-way competition.