| Year | Player | Nation |
|---|---|---|
| 2020** | Not Held** | Not Held** |
| 2021 | Ylvie Zahn | Germany |
| 2022-2023 | Not Held | Not Held |
** The 2020 World Championships were cancelled by COVID-19.
Upsets on day 1 of the IWT Swiss Open
Sanne Veldkamp
May 24, 2025
| Year | Player | Nation |
|---|---|---|
| 2020** | Not Held** | Not Held** |
| 2021 | Ylvie Zahn | Germany |
| 2022-2023 | Not Held | Not Held |
