[3] He trialed for multiple clubs in Europe with the likes of Liverpool, Manchester City, Leeds, Chelsea, Wolves, Ajax, Dinamo Zagreb and Rangers.
[6][7][8] After winning the MVP award at a football camp, Segecic made a strong impression on Sydney FC, who subsequently invited him to join the academy squad.
[16] On 26 December 2021, Segecic made his professional league debut against Macarthur FC, coming off the bench in the 76th minute in a 3–0 away win.
[19][20] On 7 April 2022, Sydney FC announced Segecic among the ten youth players registered for the AFC Champions League ahead of the group stage.
[24] In this match, he contributed an assist to Adam Le Fondre for the team's third goal, helping them secure a 3–3 draw and a win in the penalty shoot-out.
[25] His performance from last match earnt him a starting place in the next round against Bentleigh Greens, scoring his first senior goal for the club in a 2–1 win by full time.
[28][29][30] Segecic made his Big Blue debut in the opening round of the 2022–23 A-League season playing in front of 21,840 fans as his side lost 3–2 at home.