Complex sentence: Today, Hajduk's biggest rivals are Dinamo Zagreb, the matches between the two teams are referred to as "Eternal derby"; and Rijeka, with matches referred to as the Adriatic derby.
Split into simpler sentences: Today, Hajduk's biggest rivals are Dinamo Zagreb, the matches between the two teams are referred to as "Eternal derby". Matches between Hajduk and Rijeka are referred to as the Adriatic derby.