There is also the issue that if extra time is played in the second leg, the away team gets an extra 30 minutes to take advantage of the away goals rule. This can be countered by the fact that in extra time, the home team has the advantage of playing the extra 30 minutes at home. In addition, usually, the home team had made a better campaign in the group stage, which would naturally give it some advantage over the away team. In UEFA Champions League 2020/21, Porto eliminated Juventus because of a goal scored during the extra time. Both games ended 2-1 after 90 minutes from each game, Porto winning the first and Juventus winning the second. In the extra time, both teams also scored, and Porto qualified due to the away goal (won 2-1 on away goals with a 4-4 aggregate score), despite the fact that Juventus had the 3rd best campaign in the group stage.