1998–99 NK Croatia Zagreb season

Croatia Zagreb made their debut in the Champions League group stage, drawn against Olympiakos, Porto and Ajax.

His replacement, Velimir Zajec, inspired a turnaround and wins against Porto and Ajax gave the club hope of reaching the quarter-finals.

In the first round of the Croatian Football Cup the club was sensationally knocked out by fourth-level amateur side NK Dugo Selo 3–2.

Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.

Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.