Stadium: Court 5 Round: 54 Ground: Clay
| ITF W25 Guayaquil Qual | 2023/04/23 19:25 | Amanda C Nava Elkin v Katja Markus | 6-0,6-0 |
| ITF W25 Guayaquil | 2023/04/16 15:00 | Katja Markus v Ena Koike | 0-6,0-6 |
| ITF W25 Tucuman | 2023/02/28 14:55 | Katja Markus v Carla Markus | 1-6,5-7 |
| ITF W25 Tucuman | 2023/02/27 13:00 | Marina Bulbarella v Katja Markus | 6-7,6-3,6-10 |
| ITF W25 Tucuman | 2023/02/26 12:00 | Katja Markus v Sol Rabin | 3-6,6-4,10-8 |
| ITF W25 Tucuman | 2023/02/20 13:00 | Paloma G Weinreich v Katja Markus | 6-3,6-0 |
| ITF W25 Tucuman | 2023/02/19 12:00 | Katja Markus v Florencia B Moron | 6-4,6-2 |
| ITF W15 Buenos Aires | 2022/11/27 15:30 | Paula Corbalan v Katja Markus | 2-6,7-5,10-6 |
| ITF W15 Piracicaba | 2022/04/20 14:35 | Bianca G Lampert v Natalia Alves De Lima | 4-6,1-6 |
| ITF W15 Piracicaba | 2022/04/19 13:00 | Gabriela Y Almeida v Bianca G Lampert | 0-6,2-6 |
| ITF W25 Blumenau-Gaspar | 2022/01/12 16:10 | Bianca G Lampert v Jana Kolodynska | 0-6,1-6 |
| ITF W25 Blumenau-Gaspar | 2022/01/10 16:35 | Sofia Carvalho Rocha v Bianca G Lampert | 4-6,3-6 |