Hrvoje Smolčić

After playing for the youth teams of Croatian club Rijeka, Smolčić made his professional debut for the club's first team on 17 March 2019, when he appeared as a starter in a 3–1 victory against Osijek. In the 2019–20 season, he played 24 league matches and won the Croatian Cup with his team, appearing in three cup matches, but missing the final against Lokomotiva Zagreb due to being suspended after receiving two yellow cards in the semi-final. On 31 May 2022, it was announced that Smolčić will move to Bundesliga side Eintracht Frankfurt for the 2022–23 season, on a five-year deal until 2027. On 24 June 2024, Smolčić was loaned by LASK in Austria. On 6 September 2025, he was loaned by Kocaelispor in Turkey, with an option to buy.

On 14 August 2018, Smolčić played his first international game for the Croatian under-19 team, coming off the bench for Leon Kreković in a friendly match against Italy. After playing four more matches for the under-19 team and appearing in two matches for the under-20 squad, he debuted for the under-21 team on 8 October 2021 in a European Under-21 Championship qualifying match against Norway.

As of match played 1 June 2025

Hrvoje's twin brother Ivan is also a professional footballer. The twins moved to HNK Rijeka Academy together in 2014.