There are 32 places at the World Cup in Russia and 23 have now been claimed - find out who has already booked their spot at next summer's finals.
Iran become the second team to qualify for the 2018 World Cup as they beat Uzbekistan 2-0 in Tehran.
Iran are fined by Fifa after fans sing religious chants at a World Cup qualifier played on a holy day in the country.
Iran fans watch their team beat South Korea 1-0 in a World Cup qualifier, despite the constraints imposed by a holy day.
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Between now and the 12th of June we'll be providing you with a guide for each of the competing teams.