Celtic later progressed to the final. A total of seven European Cup ties were decided by a coin toss, with Galatasaray being the only team to be involved twice, winning one and losing one. Away goals The away goals rule was introduced in 1967–68, with Valur beating Jeunesse Esch 4–4 (1–1 at home, 3–3 away) and Benfica beating Glentoran 1–1 (1–1 away, 0–0 at home), both in the first round. Benfica later progressed to the final. In 2002–03, Milan and Inter met in the semi-finals. Sharing the same stadium (San Siro), they drew 0–0 in the first leg and 1–1 in the second. However, Milan were the designated away side in the latter, and thus became the only team to win on "away" goals without having scored a goal away from their own stadium. The quarter-final of the 2020–21 season between previous year's finalists Bayern Munich and Paris Saint-Germain was the last to be decided by the away goals rule before its abolition from the following season. Milan, Paris Saint-Germain and Porto are the only teams to have advanced on the away goals rule after extra time: In the semi-finals against Bayern Munich in 1989–90, Milan won 1–0 at home and were 0–1 down after 90 minutes in the second leg. Both teams scored one goal each in extra time, giving Milan the victory on away goals. In the round of 16 against Chelsea in 2014–15, Paris Saint-Germain drew 1–1 both home and away. Both teams scored one goal each in the extra time period played in London, giving Paris Saint-Germain the victory on away goals. In the round of 16 against Juventus in 2020–21 (the last season the away goals rule was used), Porto won 2–1 at home and were 1–2 down after 90 minutes in the second leg. Both teams scored one goal each in the extra time period played in Turin, giving Porto the victory on away goals. Penalty shoot-out The first penalty shoot-out in the European Cup was between Everton and Borussia Mönchengladbach on 4 November 1970, after both games ended 1–1. Gladbach's Klaus-Dieter Sieloff was the first player to score from a penalty kick, while Everton's Joe Royle was the first to miss. Everton went on to win 4–3 with Sandy Brown scoring the decisive goal. The first penalty shoot-out in a final was between Liverpool and Roma in the 1984 final following a 1–1