Editing De Graafschap (section)

===Invincibles and eight years Eredivisie (1990–2003)===
In the [[1990–91 Eerste Divisie|1990–91 season]], under the management of [[Simon Kistemaker (football manager)|Simon Kistemaker]], De Graafschap achieved an undefeated championship title in the [[Eerste Divisie]].<ref>{{cite news |last1=Sommerdijk |first1=Jan |title=Boek over culttrainer Kistemaker: 'Legende voor De Graafschap' |url=https://www.gld.nl/sport/8059693/boek-over-culttrainer-kistemaker-legende-voor-de-graafschap |access-date=10 February 2024 |work=Omroep Gelderland |date=17 December 2023 |archive-url=https://web.archive.org/web/20231217075419/https://www.gld.nl/sport/8059693/boek-over-culttrainer-kistemaker-legende-voor-de-graafschap |archive-date=17 December 2023 |language=nl}}</ref> However, their [[Eredivisie]] stay lasted only one season as they were immediately relegated the following year.<ref>{{cite news |title=Kistemaker: 'Omkoping bij degradatie' |url=https://www.gelderlander.nl/de-graafschap/kistemaker-omkoping-bij-degradatie~a86c6c32/ |access-date=10 February 2024 |work=De Gelderlander |date=6 November 2009 |language=nl}}</ref>

Between 1995 and 2003, De Graafschap enjoyed its lengthiest unbroken tenure in the Eredivisie. Under [[Fritz Korbach]]'s management in 1997, the club achieved its highest-ever league finish, securing eighth place.<ref>{{cite web |title=Met Fritz Korbach naar de top 3 (video docu) |url=https://www.degraafschap.nl/nieuws/met-fritz-korbach-naar-de-top-3-video-docu |website=De Graafschap |access-date=10 February 2024 |archive-url=https://web.archive.org/web/20230930153916/https://www.degraafschap.nl/nieuws/met-fritz-korbach-naar-de-top-3-video-docu |archive-date=30 September 2023 |language=nl |date=11 November 2016 |url-status=live}}</ref> Subsequently, the club's performance began to decline, and in 2003, under the guidance of [[Peter Bosz]], De Graafschap suffered relegation back to the Eerste Divisie after an eight-year spell in the top flight.<ref>{{cite news |title=Peter Bosz weg bij De Graafschap |url=https://www.vi.nl/nieuws/peter-bosz-weg-bij-de-graafschap |access-date=10 February 2024 |work=Voetbal International |date=30 May 2003 |archive-url=https://web.archive.org/web/20240210191813/https://www.vi.nl/nieuws/peter-bosz-weg-bij-de-graafschap |archive-date=10 February 2024 |language=nl}}</ref>