In a 1991 interview, Korbach racially abused black players Bryan Roy ("een kleine rotneger", "a short damn negro") and Romário ("die koffieboon van PSV", "that coffee bean of PSV").
In the upcoming seasons a few other managers were not able to improve Heerenveen's football potential until Fritz Korbach, who previously managed FC Wageningen, PEC Zwolle, FC Volendam and FC Twente towards the Eredivisie also managed Heerenveen to the highest level of Dutch football.
Fritz Lang | Korbach | Fritz Leiber | Fritz Kreisler | Fritz Weaver | Fritz Reiner | Fritz Haber | Robert Fritz | Robert C. Fritz | Fritz Gesztesy | Fritz Dreisbach | Chris Fritz | L'amico Fritz | Fritz London | Fritz Laves | Fritz Kranefuss | Fritz Grünbaum | Dennis Fritz | Fritz von Opel | Fritz | Fritz Wunderlich | Fritz Walter | Fritz Vahrenholt | Fritz Todt | Fritz Thyssen | Fritz the Cat (film) | Fritz Stern | Fritz Reuter | Fritz Odemar | Fritz Lenz |