Editing Feyenoord (section)

===Falling out of contention===
In 1978, the club divided their professional and amateur sides to form two separate teams, Feyenoord Rotterdam for professionals and [[SC Feyenoord]] for amateurs.<ref name="split">[http://www.frgoals.nl/index.php?pagina=historie Splitsing en weer prijzen] {{Webarchive|url=https://web.archive.org/web/20160303203845/http://www.frgoals.nl/index.php?pagina=historie |date=3 March 2016 }}, frgoals.nl</ref>

Feyenoord won their fifth Dutch Cup in 1980 by beating Ajax 3–1 in the final.<ref name="split"/>
In 1984, Feyenoord had another bright season, winning the double for the third time in their history.<ref name="split"/> Key players in the squad from this period included [[Johan Cruyff]], [[Ruud Gullit]] and [[Peter Houtman]] (who later became the Feyenoord stadium announcer).<ref name="johan">[http://www.cruijff.com/eng/player/feyenoord_eng/ Playing for Feyenoord] {{webarchive|url=https://web.archive.org/web/20070210160658/http://www.cruijff.com/eng/player/feyenoord_eng/ |date=10 February 2007 }}, cruijff.com</ref> Cruyff reacted to Ajax's decision not to offer him a new contract at the start of the season and signed for archrivals Feyenoord instead.<ref name="johan"/> Cruyff's move to Rotterdam was criticised and increased Ajax's motivation to beat Feyenoord. In the Olympic Stadium of Amsterdam Feyenoord suffered one of their most heavy defeats ever: 8–2.<ref>[http://www.footballderbies.com//results/match_details.php?id=9&match_id=421 1983 Ajax-Feyenoord 8–2], footballderbies.com</ref> However, Feyenoord later defeated Ajax in Rotterdam 4–1 and Ajax were subsequently beaten a second time in the Dutch Cup.<ref>[https://www.rsssf.org/tablesa/ajaxfeyenoord.html Ajax vs. Feyenoord since 1922], rsssf.org</ref> Feyenoord proceeded to win a league and cup double by beating [[Fortuna Sittard]] in the cup final.<ref>[http://www.foot.dk/Holpokal.asp KNVB-beker finales], foot.dk</ref>

After the successful season, Feyenoord experienced a lean period and were unable to finish the season in a higher position than third.<ref>[http://www.foot.dk/Holklubres.asp?id=33 Feyenoord Final League Standings] {{webarchive|url=https://web.archive.org/web/20051003215948/http://www.foot.dk/Holklubres.asp?id=33 |date=3 October 2005 }}, foot.dk</ref> In the 1989–90 season, the club struggled to remain in the Eredivisie, but eventually managed to avoid relegation.<ref>[http://www.foot.dk/Holstilling.asp?SeasonID=92 Eredivisie 1989/90] {{Webarchive|url=https://web.archive.org/web/20070728111846/http://www.foot.dk/Holstilling.asp?SeasonID=92 |date=28 July 2007 }}, foot.dk</ref> The club had financial problems, and as a result, the staff was not able to recover and their main sponsor, HCS went bankrupt.<ref>[http://home.student.uva.nl/joost.vanbloois/historie/historie.html De zwarte bladzij]{{dead link|date=September 2017 |bot=InternetArchiveBot |fix-attempted=yes }}, uva.nl</ref>