Herzegovina
Herzegovina ( or ; Serbo-Croatian: "Hercegovina", Херцеговина, ) is the southern region of Bosnia and Herzegovina. While there is no official border distinguishing it from the Bosnian geographical region, it is sometimes asserted that the borders of the region are Dalmatia to the southwest, Montenegro to the east, Mount Maglić to the northeast, and Mount Ivan to the north. Measurements of the area range from , or around 22% of the total area of the present-day country, to , around 24% of the country.
HŠK Zrinjski Mostar
Other notable rivals of Zrinjski are Sarajevo clubs FK Sarajevo and FK Željezničar. Those clubs with famous history, along with Zrinjski are favorites for the top of the table almost every season. One of the other reasons for this rivalry is that Mostar is the center of Herzegovina, while Sarajevo is the center of Bosnia, and the capital of the entire country.
Also there is a rivalry with NK Široki Brijeg, the other top team from Herzegovina. This rivalry started during Herzeg-Bosnia league (1994–00), and continued in Premier League.