Stadium: Court 10 Round: 54 Ground: Clay
| ITF W35 Buenos Aires | 2024/01/14 12:30 | Sofia Constanza Karlau v Katja Markus | 1-6,6-3,10-4 |
| ITF W35 Buenos Aires | 2024/01/15 12:30 | Rebeca Pereira v Sofia Constanza Karlau | 6-2,6-2 |
| ITF W35 Buenos Aires | 2024/01/14 12:30 | Sofia Constanza Karlau v Katja Markus | 1-6,6-3,10-4 |
| ITF W15 Cordoba | 2023/11/22 16:40 | Rocio D Merlo v Sofia Constanza Karlau | 6-3,7-6 |
| ITF W15 Cordoba | 2023/11/21 16:50 | Sofia Constanza Karlau v Pilar B Lespiau | 6-1,1-6,5-10 |
| ITF W15 Cordoba | 2023/11/21 13:00 | Sofia Constanza Karlau v Lara B F D A Santos | 6-2,6-0 |
| ITF W15 Buenos Aires | 2023/11/14 16:15 | Mariana Zottoli v Sofia Constanza Karlau | 6-3,6-7,6-2 |
| ITF W25 Mendoza | 2023/10/02 16:00 | Sofia Constanza Karlau v Maria Victoria Marchesini | 4-6,1-6 |
| ITF W25 Lujan | 2023/09/24 13:00 | Sofia Constanza Karlau v Carla Markus | 5-7,0-6 |
| ITF W35 Buenos Aires | 2024/01/14 12:30 | Sofia Constanza Karlau v Katja Markus | 1-6,6-3,10-4 |
| UTR Pro Tigre Women | 2023/11/30 18:45 | Justina M Gonzalez Daniele v Katja Markus | 5-7,6-2,6-2 |
| UTR Pro Tigre Women | 2023/11/29 19:17 | Rocio D Merlo v Katja Markus | 6-0,6-3 |
| UTR Pro Tigre Women | 2023/11/29 12:55 | Daria Lodikova v Katja Markus | 6-1,5-0 |
| UTR Pro Tigre Women | 2023/11/27 12:00 | Martina M Bovio v Katja Markus | 3-6,3-5 |
| UTR Pro Tigre Women | 2023/11/26 12:00 | Katja Markus v Susan Doldan | 6-0,6-4 |
| ITF W15 Cordoba | 2023/11/21 13:00 | Katja Markus v Francesca Mattioli | 6-7,3-6 |
| ITF W15 Buenos Aires | 2023/11/14 18:50 | Katja Markus v Leticia Garcia Vidal | 0-6,0-6 |