Roth was a big game player and had a knack of scoring important goals in massive games for Bayern Munich. He scored the only goal of the 1967 European Cup Winners' Cup Final against Rangers in extra time, which was enough to give Bayern victory, and their first triumph in European competition. He opened the scoring in the 1975 European Cup Final win over Leeds United, a game in which Roth won the midfield battle against Billy Bremner. Roth scored for the third time in the final of a European competition, with his 57th-minute strike against AS Saint-Étienne 1976 European Cup Final enough to give Bayern a 1–0 victory, and retain the European Cup for the third straight season.