2004, she started on the ITF Circuit, where she won six singles and six doubles titles.

Her preferred surface is hardcourt, and her coach was Ivan Humić.

Along with Svetlana Kuznetsova, she reached 2002 Australian Open junior doubles competition, where they lost to Indonesian Angelique Widjaja and Argentine Gisela Dulko.

Mezak also was on the Croatia Fed Cup team, in 2005 and 2006.

This biographical article relating to Croatian tennis is a stub.