The manager of Real Madrid who was fired during the 1997-1998 season played striker for which team in the 1960s?
1997–98 Real Madrid C.F. season: Real Madrid failed to retain their La Liga title, but made up for the domestic disappointment by winning the UEFA Champions League with a 1–0 win over Juventus in Amsterdam, their first European Cup since 1966. Jupp Heynckes:  As a player, he spent the majority of his career as a striker for Borussia Mönchengladbach in its golden era of the 1960s and '70s, where he won many national championships and the DFB-Pokal, as well as the UEFA Cup.
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