Ground: Clay
| ITF W15 Bucharest | 2025/05/13 09:00 | Diana-Ioana Simionescu v Elena Ruxandra Bertea | 4-6,2-6 |
| ITF W15 Bucharest | 2025/05/06 08:06 | Maria Sara Popa v Diana-Ioana Simionescu | 7-6,6-2 |
| ITF W15 Antalya | 2025/03/20 12:00 | Arina Bulatova v Diana-Ioana Simionescu | 4-6,6-1,6-2 |
| ITF W15 Antalya | 2025/03/19 12:30 | Diana-Ioana Simionescu v Ekaterina Ovcharenko | 6-1,4-6,5-3 |
| ITF W15 Antalya | 2025/03/14 09:30 | Diana-Ioana Simionescu v Yelyzaveta Kotliar | 2-6,6-2,3-6 |
| ITF W15 Antalya | 2025/03/13 08:00 | Ilinca D Amariei v Diana-Ioana Simionescu | 7-5,5-7,4-6 |
| ITF W15 Antalya | 2025/03/12 07:00 | Diana-Ioana Simionescu v Karine Sarkisova | 6-3,6-3 |
| ITF W15 Antalya | 2025/03/06 09:00 | Alice Rame v Diana-Ioana Simionescu | 2-6,6-2,6-2 |
| ITF W50 Troisdorf | 2025/06/07 15:20 | Oana Georgeta Simion v Alexis Blokhina | 3-6,1-6 |
| ITF W50 Troisdorf | 2025/06/07 09:00 | Mara Guth v Oana Georgeta Simion | 7-6,5-7,5-7 |
| ITF W50 Troisdorf | 2025/06/05 08:00 | Oana Georgeta Simion v Ekaterine Gorgodze | 6-4,4-6,6-4 |
| ITF W50 Troisdorf | 2025/06/04 12:30 | Oana Georgeta Simion v Anastasiia Firman | 6-2,7-5 |
| ITF W50 Troisdorf | 2025/06/03 12:00 | Oana Georgeta Simion v Valentina Steiner | 7-6,6-4 |
| ITF W50 Troisdorf | 2025/06/02 13:41 | Oana Georgeta Simion v Mia Slama | 6-1,6-3 |
| ITF W75 Brescia | 2025/05/27 15:22 | Caty McNally v Oana Georgeta Simion | 6-1,6-0 |
| ITF W75 Brescia | 2025/05/26 08:30 | Lavinia Luciano v Oana Georgeta Simion | 5-7,5-7 |