Article snapshot taken from Wikipedia with creative commons attribution-sharealike license.
Give it a read and then ask your questions in the chat.
We can research this topic together.
This is an old revision of this page, as edited by Qed237 (talk | contribs) at 13:10, 13 September 2015 (Reverted 2 edits by TFCFAN99 (talk): Source? and try not to link to redirect. (TW)). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.
A total of 12 teams (teams ranked 1 to 6 in the CONCACAF entrant list and 6 third round winners) were divided into three groups of four teams each. In each group, teams play against each other home-and-away in a round-robin format for a total of six matches per team. The top two teams of each group (three group winners and three runners-up) will advance to the fifth round (also called the 'Hex').
Seeding
The draw for the fourth round was held as part of the 2018 FIFA World Cup Preliminary Draw on 25 July 2015, starting 18:00 MSK (UTC+3), at the Konstantinovsky Palace in Strelna, Saint Petersburg, Russia.
The seeding was based on the FIFA World Rankings of August 2014 (shown in parentheses). The six direct qualifiers are seeded into two pots:
Pot 1 contains the teams ranked 1–3.
Pot 2 contains the teams ranked 4–6.
Each tie contains a team from Pot 1, a team from Pot 2, and two third round winners which are automatically allocated into each group (series winners 1 and 2 into Group A, series winners 3 and 4 into Group B, series winners 5 and 6 into Group C).
El Salvador
Honduras
Haiti
Panama
Saint Vincent and the Grenadines
Trinidad and Tobago