1
The top four qualify automatically for Russia with the fifth-ranked team going into an intercontinental playoff.
2
The top four qualify automatically and the fifth-placed side go into an intercontinental playoff against Oceania winners New Zealand.
3
The winner of the two game series moves through to an intercontinental playoff match against the fifth placed South American team.
4
The 33-year-old, Peru's all-time top scorer, netted six goals in the qualifying stage to lead his country to the intercontinental playoff.
5
The top three teams qualify automatically for the World Cup, while the fourth team faces an intercontinental playoff against New Zealand.
6
Whichever team misses out on an automatic qualification place can still reach the World Cup by beating Argentina in an intercontinental playoff.
7
Previous meetings: Spain and Morocco have not met since they faced each other in an intercontinental playoff tie to qualify for the 1962 World Cup.
8
The top four go through to the 2018 finals in Russia with the fifth, at present Argentina, qualifying for an intercontinental playoff for another berth.
9
The top four after 18 matches qualify for the finals in Russia, while the fifth-placed team goes into an intercontinental playoff for one more berth.
10
Herrera was appointed solely for the intercontinental playoff in which Mexico completed a 9-3 aggregate victory over New Zealand in Wellington.
11
The top four teams in the 10-nation group qualify for the 2018 World Cup finals, while the fifth-placed side goes into an intercontinental playoff.