The 2021 CS Finlandia Trophy was held on October 7–10, 2021 in Espoo, Finland.

[2] Medals were awarded in the disciplines of men's singles, women's singles, pairs, and ice dance.

After the previous Challenger Series event, the Nepela Memorial, was cancelled, the event organizers received a higher-than-anticipated interest number of entries.

As a result, the competition was extended one day to begin on Thursday, October 7, rather than the original Friday, October 8 start date.

[3] The International Skating Union published the list of entries on September 14, 2021.