https://www.espn.com/soccer/uefa-cha...b-competitions
Away goals rule abolished: UEFA announces major shake-up of club competitions
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The rule, which had been in place since 1965, was used to determine a winner when teams were level on aggregate after a two-legged match. The team that had scored more goals as the away side were awarded the victory. But from now, this will be replaced by extra-time and penalties."