German, French and Dutch leagues are:
1. Compare the goal difference first, and the one with more goal difference in the league comes first.
2. If 1 is the same, compared with the total number of goals, the league with more total goals ranks first.
3. If 1 and 2 are the same, compared with the record of two rounds, the one with more total goals ranks first.
4. If 1, 2, and 3 are all the same, compare the number of goals scored away from home in the two rounds, and the one with more away goals ranks first (this rule 3 and 4 is similar to the promotion principle of the two rounds of knockout in the Champions League).
English and Scottish leagues:
1. Compare the goal difference first, and the one with more goal difference in the league comes first.
2. If 1 is the same, compared with the total number of goals, the league with more total goals ranks first.
3. If 1 and 2 are the same, the ranking is tied, but if it involves the ownership of the league championship, the allocation of European places, promotion and demotion, it is necessary to play a play-off in a neutral venue.
Spanish, Italian, Portuguese leagues (typical Latin countries in southern Europe) and China leagues take the following measures:
1. Compared with the record of the two rounds, the side with more total goals ranked first.
2. If 1 is the same, compare the number of away goals in two rounds, and the one with more away goals ranks first.
3. If 1 and 2 are the same, then the league goal difference is more.
4. If 1, 2, 3 are all the same, and then compare the total number of goals in the league, the one with more goals in the league ranks first.
In the case of the same score in the Champions League and the Europa League, the group ranking refers to the third scheme.