Zreika grew up in western Sydney, the youngest of five siblings. She played rugby league with her two older brothers and supported the Canterbury Bulldogs. Her mother had migrated to Australia from Lebanon when she was 16. Zreika competed in a mixed-gender rugby competition from the age of six, but was forced to stop playing when she was 12 because there were no competitions for girls of her age. She first encountered Australian rules football when she was 15; her sports teacher at Strathfield South High School invited her to a clinic scouting multicultural players. Zreika was introduced to the Auburn-Penrith Giants and began playing for them a year later in the top women's division of the AFL Sydney. She competed in the 2016 AFL Youth Girls National Championships for a combined New South Wales and Australian Capital Territory side. In 2017, Zreika was named in the inaugural AFLW Academy, one of 33 prospective female players. As part of this squad she took part in various training camps and activities. She made a brief return to rugby league in the under-18 division of the Tarsha Gale Cup, playing as a hooker for Canterbury in the final. Zreika was named as a midfielder among 54 players in 2017 AFL Women's Under 18 Championships All-Australian squad after her performance at the competition, but did not make the final team. She tested at the AFLW draft combine in the lead-up to the 2017 draft, finishing third in the two-kilometre time trial and seventh in the yo-yo endurance test. Zreika was anticipated to be drafted by Greater Western Sydney as they were the only AFLW club in New South Wales.
AFLW career
The Giants overlooked Zreika in the national draft, but later selected her with the first pick in the rookie draft. She did not play a game in 2018 and was delisted at the end of the season. Zreika returned to the Auburn-Penrith Giants and won 17 votes in the 2018 Mostyn Medal. This equalled the tally of the overall winner Pippa Smythe; however, Zreika was ineligible because of an earlier suspension. Zreika was relisted by the Giants with pick 69 in the 2018 AFLW draft. She debuted in the opening round of the 2019 season against. In round 7, on the day of the Christchurch mosque shootings, Zreika kicked her first AFLW goal against. Players observed a minute of silence prior to the match and wore black armbands. Zreika received the final nomination for the 2019 AFL Women's Rising Star award after collecting 17 disposals – a personal best – seven tackles and four clearances. She played five matches for the season.
