[2] He had to wait until July of that year to make his debut for the club, starting in a 1–1 draw against Radomlje.
[3] Ratnik would go on to make eleven more starts that season for a total of 17 league appearances alongside one appearance in the UEFA Europa Conference League third qualifying round against Portuguese club Santa Clara.
[8] In December 2024, Ratnik became the youngest ever player in Olimpija's history to reach 100 appearances in the Slovenian top division, at the age of 20 years and 350 days.
[10] He made his debut for the senior Slovenia national team on 20 January 2024 in a friendly against the United States.
He is known for his confidence with the ball at his feet, with Slovenian football portal Nogomania describing him as calm, sovereign, always alert and versatile.