Artnak has a career high ATP singles ranking of world No. 449, achieved on 22 April 2024. He is currently the No. 1 Slovenian player.[1] On the junior tour, he has a career high ITF combined ranking of 10, achieved on 16 May 2022.
Artnak has won two ITF singles titles and one doubles title.
Artnak represents Slovenia at the Davis Cup, where he has a W/L record of 2–4.[2]