Friis started playing Handball at Herning FH, before joining SINE SønderjyskE. In 2016 she joined FC Midjylland Håndbold's youth team. She made her senior debut for the team in 2016 in the Danish Cup semifinal against
Viborg HK. She continued in the club after the name change to Herning-Ikast Håndbold until 2022.
National team She made her debut on the Danish national team on 29 September 2018, against
Norway. She represented Denmark at the
2021 World Women's Handball Championship in Spain and at the
2023 World Women's Handball Championship at home, where Denmark won bronze medals on both occasions. At the
2022 European Championship she won silver medals. At the
2024 Olympics she won a bronze medal. Later the same year, she won silver medals at the
2024 European Championship, losing to Norway in the final. At the
2025 World Women's Handball Championship Denmark went out in the quarterfinal to France after winning all matches in the group stages. The Danish team was affected by a lot of players missing the tournament including goalkeepers
Sandra Toft and
Althea Reinhardt and pivots
Sarah Iversen and
Rikke Iversen. This was the first time since 2019 that Denmark left a major international tournament without any medals. ==Individual awards==