What is "ijsselderby"

De IJsselderby is a football rivalry in the Netherlands between PEC Zwolle from Zwolle and the Deventer side Go Ahead Eagles.

The actual rivalry between the teams started when they competed in the Eerste Divisie in the 1990s. Until the 1990s, Go Ahead played in the Eredivisie most of the time, competing with FC Twente. After Go Ahead Eagles relegated to the Eerste Divisie in 1989, PEC Zwolle became the more successful of both clubs, gaining promotion to the Eredivisie in 2002 and 2012, a KNVB Cup title in 2014 (5-1 against AFC Ajax in the final) and winning the Johan Cruijff Shield (Dutch Super Cup) after Ajax was again defeated (1-0).

The two clubs both lay next to the river the IJssel. Go Ahead fans call their rivals Olle, and Zwolle fans call their rivals Egels, what means hedgehogs in Dutch. There have been several fights between the fans of the two teams. It is known as one of the fiercest of derby's in the Netherlands, along with the Feyenoord-Ajax rivality ( De Klassieker) and the Derby van het Noorden between SC Heerenveen and FC Groningen.