Karolina Hardardottir ha enfrentado a 78 oponentes a lo largo de su carrera.

Player Team(s) Games
Sanja Aksam 1
Ljube Andric 1
Mai Baico
U16 Israel (W) (Euro U16 B)
1
Veronika Bakal
U16 Ukraine (W) (Euro U16 B)
1
Anais Balla 1
Martha Balunga 1
Iris Barbu
U16 Romania (W) (Euro U16 B)
1
Ilinca Belegante
U16 Romania (W) (Euro U16 B)
1
Daria Biriuk
U16 Ukraine (W) (Euro U16 B)
1
Tess Boiteux
U16 Ukraine (W) (Euro U16 B)
1
Nike Borg
U16 Sweden (W) (Euro U16 B)
1
Jelena Bulajic 1
Camille Cardis 1
Marta Carmaciu
U16 Romania (W) (Euro U16 B)
1
Tehila Cohen
U16 Israel (W) (Euro U16 B)
1
Maayan Cohen
U16 Israel (W) (Euro U16 B)
1
Naomi Cohen
U16 Israel (W) (Euro U16 B)
1
Elezandra Costa 1
Katie Cox 1
Lourdes Da Silva
U16 Sweden (W) (Euro U16 B)
1
Celina Donyo
U16 Sweden (W) (Euro U16 B)
1
Janja Dragisic 1
Nada Drobnjak 1
Erika Fernandez
U16 Sweden (W) (Euro U16 B)
1
Ana Filipovic 1
Kleyssa Gonin 1
Emilia Grun
U16 Sweden (W) (Euro U16 B)
1
Ayla Habbal 1
Kiehla Hanggli 1
Mara Harabula
U16 Romania (W) (Euro U16 B)
1
Hanna Hilberth
U16 Sweden (W) (Euro U16 B)
1
Olivia Hultgren
U16 Sweden (W) (Euro U16 B)
1
Felicia Jacobs Abiola 1
Hanna Kajevic
U16 Sweden (W) (Euro U16 B)
1
Christina Karamouzi
U16 Sweden (W) (Euro U16 B)
1
Maisie Keyes 1
N'na Dinimba Konate 1
Sofiia Korniichuk
U16 Ukraine (W) (Euro U16 B)
1
Leya Landin
U16 Sweden (W) (Euro U16 B)
1
Anastasiia Liubenska
U16 Ukraine (W) (Euro U16 B)
1
Julija Matic 1
Alexandra McIntosh 1
Elisa Moix 1
Karina Munteanu
U16 Romania (W) (Euro U16 B)
1
Roni Nave
U16 Israel (W) (Euro U16 B)
1
Greta Nemes
U16 Romania (W) (Euro U16 B)
1
Ksenija Nisavic 1
Irene Oboavwoduo 1
Ayala Oren
U16 Israel (W) (Euro U16 B)
1
Svitlana Poliantseva
U16 Ukraine (W) (Euro U16 B)
1
Lara Popovic 1
Atina Radevic 1
Andela Rakocevic 1
Gal Raviv
U16 Israel (W) (Euro U16 B)
1
Gali Rothschild
U16 Israel (W) (Euro U16 B)
1
Bianca Sarbu
U16 Romania (W) (Euro U16 B)
1
Ioana Savu
U16 Romania (W) (Euro U16 B)
1
Dragana Scepanovic 1
Felicia Scholander
U16 Sweden (W) (Euro U16 B)
1
Dariia Serednytska
U16 Ukraine (W) (Euro U16 B)
1
Zoe Sharpe 1
Maya Sharvit
U16 Israel (W) (Euro U16 B)
1
Daria Tanase
U16 Romania (W) (Euro U16 B)
1
Lee Teichman
U16 Israel (W) (Euro U16 B)
1
Carla Tenu
U16 Romania (W) (Euro U16 B)
1
Serafyma Tykha
U16 Ukraine (W) (Euro U16 B)
1
Oleksandra Tynshchuk
U16 Ukraine (W) (Euro U16 B)
1
Megan Verbeeten 1
Valentina Vrcan 1
Milena Vujovic 1
Ophir Weintraub
U16 Israel (W) (Euro U16 B)
1
Celia Wicky 1
Charley Woodman 1
Alice Woodward 1
Fiona Wyss 1
Elena Zane
U16 Romania (W) (Euro U16 B)
1
Maya Zilbershlag
U16 Israel (W) (Euro U16 B)
1
Hristina Zuber 1