[4] Passing the complete pre-season with the first team, Mesarović made his official debut for the club as a playmaker[5] in 2–1 victory over MFK Ružomberok in the first leg of the first qualifying round for 2017–18 UEFA Europa League.
[7] On 20 January 2022 as midfielder and a member of the Serbia national team under the age of 18, 19 and 21, and former Vojvodina prospect Mesarović join to Meraklije.
In the Novi Sad team, he already collaborated with coach Radoslav Batak who leads Meraklije at the moment.
[8] After a year with the selection, Mesarović was also a member of the under-19 level, making 2 appearances at the memorial tournament "Stevan Vilotić - Ćele" in matches against France[9] and Israel.
[11] Mesarović made his debut for the team in 4–0 victory over Gibraltar u21 at the Jagodina City Stadium on 1 September 2017.