Adrian Segečić

Sydney FC

After winning the MVP award at a football camp, Segečić made a strong impression on Sydney FC, who subsequently invited him to join the academy squad.^[3] In October 2016, he accepted and was officially announced as part of the squad list on 29 January 2016.^[10][11] In January 2020, He featured briefly for Sydney FC Youth in the final round of the A-League Youth against Canberra United.^[12] He was called up again in August after turning 16 a month before, making his NPL NSW debut against North Shore Mariners.^[11][13]

Segečić earned his first call-up to the A-League squad in the Finals series semi final against Adelaide United.^[14][15] He was on the bench in the Grand Final against Melbourne City.^[16] By the end of the 2020–21 campaign, Segečić won the club's Rising Star Award.^[17] On 26 December 2021, Segečić made his professional league debut against Macarthur FC, coming off the bench in the 76th minute in a 3–0 away win.^[18][19] He made his AFC Champions League debut in a play-off match against Kaya.^[20][21] On 7 April 2022, Sydney FC announced Segečić among the ten youth players registered for the AFC Champions League ahead of the group stage.^[22][23] After featuring in a number of games at the age of 17, on 9 May 2022, he was offered his first professional contract that was set to expire in 2025.^[24]

Segečić made his first start for Sydney FC in a match against Central Coast Mariners in the Round of 32 of the Australia Cup.^[25] 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.^[26] 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.^[27][28] He would score again against Oakleigh Cannons, but only a consolation goal as his side lost in a 2–1 upset and getting knocked out of the competition.^[29][30][31] Segečić 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.^[32][33] On 29 October, Segečić scored his first league goal, being on the receiving end of a cross by Jaiden Kucharski to make it 3–1 against Macarthur.^[34] The final score was 3–2 at Campbeltown.^[35][36] After an impressive display against Newcastle Jets, Segečić assisted a goal to contribute a 2–0 victory and received Player of the match.^[37][38]

Portsmouth

On 18 June 2025, Segečić joined EFL Championship club Portsmouth.^[44] He made his official debut in the season opener against Oxford United, scoring the only goal of a 1–0 win.^[45] Segečić scored Portsmouth's only goal in a 5–1 defeat to Coventry City, though the result confirmed Portsmouth's Championship status following other league results.^[46] The following game he first hat-trick for the club on 25 April, scoring all three goals in a 3–1 win over Stoke City at the Bet365 Stadium.^[47][48][49] Having scored a total of four goals, assisting a further three, he was named EFL Championship Player of the Month for April.^[50]

Youth

In July 2019, Segečić received his first call-up to the Australia U15 for the 2019 AFF U-15 Championship hosted in Thailand.^[51] He would feature in all group matches, scoring a goal in a 3–0 win against Laos.^[52]

In September 2022, Segečić was called up to the Australia U20 for the U-20 Costa Cálida Supercup in Spain.^[53] He would make his debut in a 3–0 loss against England.^[54] Segečić would remain with Australia squad, alongside teammate Jake Girdwood-Reich, to play in the 2023 AFC U-20 Asian Cup in hopes of qualifying to the U-20 World Cup.^[55][56] On 4 March 2023, he scored two goals, one being a free-kick, in a 3–2 victory against Iran in their second match of the tournament.^[57] Australia progressed to the quarter-finals of the AFC Championship but were knocked out by Uzbekistan in a penalty shoot-out.^[58] After the shoot-out led 5–4, Segečić missed the deciding penalty, leading to his team missing out on a place in the U-20 World Cup.^[59]

Senior

On 13 March 2026, Segečić received approval from FIFA to switch his international allegiance to the Croatia national team.^[60] His eligibility comes from his Croatian heritage through his grandparents, who immigrated to Australia.^[61] The decision, which came as a surprise, was controversial in his home country of Australia, as the Socceroos would lose a player regarded as among their best talents. Many fans blamed his defection on a lack of selection by head coach Tony Popović (who also happens to be of Croatian descent), while others blamed Croatian nationalism due to stating his desire to play for Croatia following the switch.^{[62][63][64][65]}