One of the toughest World Cup groups is suddenly in chaos, and now Lionel Messi and Argentina have been thrown a lifeline to advance

Chance to advance: 45%

Scenarios to advance:

• Nigeria will advance with a win over Argentina
• If Nigeria draws with Argentina, they will advance if ...
  
  
  • Iceland loses, draws, or wins by just one goal over Croatia.
  • Iceland wins by two goals, and Nigeria has the advantage in the remaining tiebreakers (goals scored, discipline).

One thing to know: Nigeria has the simplest path to the knockout round — win and they're in, lose and they're out. They're also the only team that could catch Croatia to win the group, though it would take a sizable victory over the Argentines to pull it off.

Chance to advance: 7%

Scenarios to advance:

• Iceland advances with a win over Croatia, an Argentina win over Nigeria, and an Iceland advantage over Argentina in the tiebreaker (goal differential, goals scored, discipline). Iceland holds a one-goal advantage on goal differential.
• Iceland advances if they beat Croatia by three or more goals, and Argentina draws with Nigeria.
• Iceland advances if they beat Croatia by two goals, Argentina draws with Nigeria, and Iceland wins the remaining tiebreakers (goals scored, discipline). Nigeria holds a one-goal advantage in goals scored.

One thing to know: Iceland missed its best shot at advancing by losing to Nigeria, but still have a chance to move on to the knockout stage should they pull the soccer equivalent of an inside straight. The team need to win first and foremost, by as many goals as possible. After that, it's out of their hands. While they are ahead of Argentina in the standings now, Argentina has the advantage by playing their final game against the team (Nigeria) that Argentina and Iceland are chasing.

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