[6] in April 2016, he was eliminated in the preliminary round of the European Olympic qualification in Samsun against Arjon Kajoshi,[7] and lost in the quarter-finals of the U22 European Championships in Brăila against Viktor Daschkewitsch in March 2017.

[9] In the European Olympic qualification in London in March 2020, Plantić defeated Umar Jambekov before the tournament was interrupted due to the COVID-19 pandemic.

[10] In the continuation of the qualification in Paris in June 2021, he defeated Gor Nersesyan and Emmet Brennan, before he was narrowly defeated by Benjamin Whittaker 2-3 in the semifinals and thus qualified for the 2020 Summer Olympics in Tokyo.

[13] His next professional bout came four years later, as he was booked to face Geard Ajetovic on 19 February 2022.

[17] Plantić faced the multiple-time world title challenger Khoren Gevor for the vacant WBC International Silver super middleweight title on 17 December 2022, at the Sportska Dvorana Bilankusa in Solin, Croatia.