欧冠的小组规则如下，我单列出来的那一段就是循环

Teams are ranked according to points (3 points for a win, 1 point for a draw, 0 points for a loss), and if tied on points, the following tiebreaking criteria are applied, in the order given, to determine the rankings (Regulations Articles 17.01):[3]
    Points in head-to-head matches among tied teams;
    Goal difference in head-to-head matches among tied teams;
    Goals scored in head-to-head matches among tied teams;
    Away goals scored in head-to-head matches among tied teams;

If more than two teams are tied, and after applying all head-to-head criteria above, a subset of teams are still tied, all head-to-head criteria above are reapplied exclusively to this subset of teams;

    Goal difference in all group matches;
    Goals scored in all group matches;
    Away goals scored in all group matches;
    Wins in all group matches;
    Away wins in all group matches;
    Disciplinary points (red card = 3 points, yellow card = 1 point, expulsion for two yellow cards in one match = 3 points);
    UEFA club coefficient.

【 在 hycc (还没想好) 的大作中提到: 】
: 规则描述中没有你说的第4点，而是接着你说的第5点，所以就有人认为第3点比完后，比BC的时候应该是采用接下来的第5点而不是回去重新比第1点。
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