[2] Holopainen started her career with Tapiolan Honka in the second-tier Naisten I Divisioona.

She later played for Espoo Basket Team with whom she won the Finnish Basketball Cup in 2011.

[4] The following season, she became the first Finnish woman to play in the Polish Basket Liga Kobiet when she joined AZS Politechnika Gdańsk.

[7] In August 2020, Holopainen signed with KR of the Icelandic Úrvalsdeild kvenna.

[9] For the season she led the league in scoring with 25.9 points per game while also averaging 9.3 rebounds and 1.6 assists.