Thirty-two teams were divided into eight groups by drawing lots, and each group had four teams to compete. Each team has to play with the other three teams, and only played one game. Four teams in each group played round robin and played six games (A1-A2; a 1-a3； a 1-a4； a2-a3； a2-a4； A3-a4), each game lasts for 90 minutes, and the winning, drawing and losing scores are 3, 1 and 0 respectively.
There are four teams in each group, and their ranking is determined according to the following rules:
A, the person with the highest score ranks first.
B, the group with the highest goal difference ranks first.
C, the group with the highest total number of goals ranks first.
If there are still two or more teams tied according to the above rules, they will be compared in the following order to determine the ranking order: except for all teams tied, the following rules are only formulated between tied teams.
D. Compare the goal difference of several teams in parallel. If they are still equal, then:
E. Compare the match scores between several teams (that is, the relationship between the two teams), and the winner ranks first. If there are mutual constraints (that is, A wins B, B wins C, and C wins A), then:
F, compare the total number of goals scored by several teams in parallel. If they are still equal, then:
G the organizing Committee of the world cup will decide which team will advance in a fair way (such as play-offs and lottery). ).
The top two teams in each group advanced to the knockout 1/8 finals, and the *** 16 team was "top 16".