[7] At this competition, Sandersen also competed alongside teammates Lærke Pedersen and Emma Kayerød-Rasmussenwon in the synchronous-team category, where the group received a fifth place as well.

[8] Sandersen won a gold medal in the junior's Recognized Poomsae competition (ages 15 to 17) at the 2017 Taekwondo European Championships.

[12] In February 2020, Sandersen ruptured an Achilles tendon during a training session and had to take a break from competing for six months.

[20][21] Additionally, she beat Germany's Leah Lawall in the finale and took first place in the women's freestyle competition for the third time.

She also claimed the silver medal in the women's Recognized Poomsae competition behind South Korean athlete Jooyeong Lee.