Katja Wiersholm
2021
| JAPLANTATION | 1R | |
| J1 BRADENTON | 1R | |
| US OPEN JUNIOR | 3R | |
| J1 COLLEGEPARK | Quarter | |
| J3 SANTODOMINGO-2 | Win | |
| J3 SANTODOMINGO | 2R | |
| J4 DELRAYBEACH | [3] | Quarter |
| JB1 SANDIEGO | 2R | |
| J1 SANDIEGO | 1R | |
| J2 SANTODOMINGO-2 | 2R | |
| J2 SANTODOMINGO | 1R |
2020
| JAPLANTATION-2 | 1R | |
| J4 DAYTONABEACH | [6] | Quarter |
| J4 ORLANDO | [6] | Semi |
| J4 ATLANTA-2 | [5] | 1R |
Nation
USA
Year-end Junior World Ranking
- Year-end 2021 98th
- Year-end 2020 306th
- Year-end 2019 356th
Match Details
2021 JAPLANTATION
| L | 1R | Kristina Dmitruk | 3-6 3-6 |
2021 J1 BRADENTON
| L | 1R | Celine Naef | 4-6 4-6 |
2021 US OPEN JUNIOR
| W | 1R | Linda Klimovicova | 7-5 6-1 |
| W | 2R | Mara Guth | 5-7 6-4 6-1 |
| L | 3R | Kristina Dmitruk | 4-6 1-6 |
2021 J1 COLLEGEPARK
| W | 1R | Ya Yi Yang | 6-2 3-6 6-4 |
| W | 2R | Tatum Evans | 6-7 6-4 6-4 |
| W | 3R | Alexandra Yepifanova | 6-1 6-3 |
| L | QF | Mirra Andreeva | 3-6 4-6 |
2021 J3 SANTODOMINGO-2
| W | 1R | Annabelle Xu | 6-4 6-4 |
| W | 2R | Ana Candiotto | 6-2 6-3 |
| W | QF | Mio Mushika | 6-1 7-5 |
| W | SF | Alexia Harmon | 6-2 6-0 |
| W | F | Victoria Mboko | 5-7 7-5 7-5 |
2021 J3 SANTODOMINGO
| W | 1R | Juliana Munhoz | 6-2 6-2 |
| L | 2R | Kayla Cross | 7-6 4-6 3-6 |
2021 J4 DELRAYBEACH
| W | 1R | Jingyi Li | 6-2 6-3 |
| W | 2R | Daniela Livson | 6-1 6-3 |
| L | QF | Gabriella Broadfoot | 6-3 4-6 2-6 |
2021 JB1 SANDIEGO
| W | 1R | Charlotte Owensby | 6-1 6-3 |
| L | 2R | Alexandra Yepifanova | 6-2 1-6 3-6 |
2021 J1 SANDIEGO
| L | 1R | Victoria Mboko | 3-6 6-2 3-6 |
2021 J2 SANTODOMINGO-2
| W | 1R | Patricija Paukstyte | 7-6 6-3 |
| L | 2R | Marina Stakusic | 2-6 2-6 |
2021 J2 SANTODOMINGO
| L | 1R | Amelia Waligora | 5-7 7-6 4-6 |
2020 JAPLANTATION-2
| L | 1R | Vivian Ovrootsky | 4-6 5-7 |
2020 J4 DAYTONABEACH
| W | 1R | Ada Jane Dealcantara | 6-1 7-5 |
| W | 2R | Cecilia Alcobe Garibay | 7-5 6-2 |
| L | QF | Chelsea Fontenel | 3-6 4-6 |
2020 J4 ORLANDO
| W | 1R | Gracie Epps | 6-4 6-3 |
| W | 2R | Lara Smejkal | 6-1 3-0 |
| W | QF | Grace Odonnell | 3-6 7-6 4-0 |
| L | SF | Ashlyn Krueger | 1-6 3-6 |
2020 J4 ATLANTA-2
| L | 1R | Emma Charney | 4-6 1-6 |
Junior Tennis Database is a site that summarizes the results of ITF junior tennis tournaments.
Number of registered tournaments: 10145, Number of registered players: 6,439, Number of registered results: 374,067