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Ježek moved back to the Netherlands in 1978 as coach of Feyenoord. His best league finish with the Rotterdam club was second in 1979. On leaving Feyenoord in 1982, Ježek was twice coach of Sparta Prague again in the next decade, and started a long period of success for the club, winning the Czechoslovak title several times. In 1993, he became the provisional head coach of the joint Czech-Slovak team, formed after the Czech Republic and Slovakia split in November 1992, in the qualifiers for the 1994 World Cup. During the 1990s he also continued as a member of the managerial stuff of Slavia Prague. He also coached FC Zürich.