Stadium: C Round: 25
| ITF Women Ystad | 2018/06/21 14:15 | Kaja Juvan v Koelzer, Romy | 6-1,7-5 |
| ITF Women Ystad | 2018/06/20 08:15 | Caijsa W Hennemann v Koelzer, Romy | 7-6,1-6,2-6 |
| ITF Women Ystad | 2018/06/19 10:55 | Koelzer, Romy v Polina Leykina | 6-4,6-2 |
| ITF Women Oeiras | 2018/05/24 17:00 | Lucia Martinez v Koelzer, Romy | 7-5,3-6,6-3 |
| ITF Women Oeiras | 2018/05/23 11:15 | Kokeladze, Kamilla v Koelzer, Romy | 2-6,4-6 |
| ITF Women Wiesbaden | 2018/04/26 09:00 | Koelzer, Romy v Zimmermann, Kimberley | 3-6,1-6 |
| ITF Women Wiesbaden | 2018/04/25 09:00 | Anna Bondar v Koelzer, Romy | 6-2,3-6,6-7 |
| ITF Women Wiesbaden Qual | 2018/04/24 08:00 | Koelzer, Romy v Meers, Luna | 4-6,6-0,6-1 |
| ITF Women Ystad | 2018/06/20 11:10 | Katarzyna Kawa v Zmau, Michele Alexandra | 6-4,7-5 |
| ITF Women Ystad | 2018/06/19 12:25 | Zmau, Michele Alexandra v Heisen, Vivian | 7-6,6-1 |
| ITF Women Padova | 2018/06/13 08:00 | Zmau, Michele Alexandra v Zarycka, Anastatsia | 5-7,6-7 |
| ITF Women Brescia Qual | 2018/06/03 12:25 | Piter, Katarzyna v Zmau, Michele Alexandra | 6-1,6-4 |
| Rome, Singles W-WITF-ITA-10A | 2018/05/08 11:35 | Di Giuseppe, Martina v Zmau, Michele Alexandra | 6-1,7-5 |
| ITF Women Hammamet | 2018/04/27 09:00 | Rosca, Ioana Loredana v Zmau, Michele Alexandra | 2-6,6-4,6-4 |
| ITF Women Hammamet | 2018/04/26 09:00 | Ayala Serra, Nora v Zmau, Michele Alexandra | 1-6,0-6 |
| ITF Women Hammamet | 2018/04/25 09:00 | Fiona Codino v Zmau, Michele Alexandra | 0-6,2-6 |