In 2004, Mönchengladbach appointed Dick Advocaat, who had guided the Netherlands national team to the semi-finals of UEFA Euro 2004 and was a successful manager at Rangers, as their new coach. However, Advocaat was unable to turn the team's fortunes and resigned in April of the following year. Former Mönchengladbach player and German international Horst Köppel was appointed caretaker for the remaining five fixtures of the season. Köppel had managed the club's reserves since leaving Borussia Dortmund in June 2004. For the 2006–07 season, legendary Mönchengladbach player and coach Jupp Heynckes was appointed as team coach.