World Cup group permutations
Fixtures (Thursday, 9pm BST): South Korea vs. Belgium, Algeria vs. Russia
Belgium: Already assured of their passage, and need a point against South Korea to win the group.
Algeria: Must beat Russia to be guaranteed a place in the knockout rounds, and if they do that they could also top the group if Belgium lose to South Korea. A draw will likely also be enough due to their superior goal difference up against South Korea, as a point will send Algeria through unless South Korea beat Belgium by three goals or more.
Russia: Have to win against Algeria, and will definitely go through if South Korea do not beat Belgium. But a win might not be enough, as South Korea could overtake them on goal difference if they do win.
South Korea: Must pick up all three points against Belgium and hope other results go their way. If Algeria-Russia is a draw, then South Korea would have to win by at least three goals to go through. If Russia beat Algeria, then South Korea need to win by a greater margin than Russia to qualify. If Algeria beat Russia, then South Korea are out.
1) Overall goal difference
2) Overall goals scored
3) Head to head in games between those teams
4) Goal difference in games between those teams
5) Goals scored in games between those teams
6) Drawing of lots
Dale Johnson has been an editor and journalist at ESPN for 17 years. You can follow him on Twitter @dalejohnsonESPN.