| WTA St. Petersburg | 02/05 11:15 | 45 | [84] Anna Bondar v Jule Niemeier [120] | 4-6,3-6 | |
| Australian Open - Kobiety | 01/14 06:20 | 19 | [191] Arianne Hartono v Jule Niemeier [130] | 6-1,1-6,6-3 | |
| Australian Open - Kobiety | 01/13 03:35 | 15 | [227] Simona Waltert v Jule Niemeier [130] | 1-6,1-6 | |
| Australian Open - Kobiety | 01/11 05:35 | 14 | Yuriko Lily Miyazaki v Jule Niemeier | 5-7,1-6 | |
| Australian Open - Kobiety | 01/11 03:30 | - | Yumi Miyazaki v Jule Niemeier | 5-7,1-6 | |
| WTA Melbourne 1 | 01/03 02:00 | 14 | [133] Jule Niemeier v Qinwen Zheng [126] | 4-6,0-6 | |
| WTA Nur-Sultan | 09/28 10:00 | 25 | [408] Vera Lapko v Jule Niemeier [132] | 7-5,4-6,6-4 | |
| WTA Luksemburg | 09/14 19:40 | 25 | [30] Jelena Ostapenko v Jule Niemeier [133] | 6-2,6-2 | |
| WTA Luksemburg | 09/12 11:40 | 19 | [146] Jule Niemeier v Tereza Smitkova [336] | 6-7,6-3,6-4 | |
| WTA Luksemburg | 09/11 15:55 | 14 | Jule Niemeier v Lena Papadakis | 7-6,4-6,6-3 | |
| US Open - Kobiety | 08/26 15:00 | 15 | [154] Mihaela Buzarnescu v Jule Niemeier [146] | 6-3,4-6,6-0 | |
| US Open - Kobiety | 08/24 15:00 | 14 | [200] Giulia Gatto Monticone v Jule Niemeier [146] | 2-6,2-6 | |
| WTA Chicago | 08/20 21:20 | 27 | [174] Emma Raducanu v Jule Niemeier [142] | Retired | |
| WTA Chicago | 08/19 20:35 | 26 | [142] Jule Niemeier v Amanda Anisimova [74] | Retired | |
| WTA Chicago | 08/17 22:15 | 25 | [150] Jule Niemeier v Greet Minnen [113] | 6-2,6-2 | |
| WTA Chicago | 08/16 17:15 | 14 | Kristina Kucova v Jule Niemeier | Cancelled | |
| WTA Montreal | 08/08 18:15 | 19 | [61] Alison Van Uytvanck v Jule Niemeier [148] | 6-7,6-0,6-3 | |
| WTA Montreal | 08/07 20:15 | 14 | [148] Jule Niemeier v Astra Sharma [112] | 6-4,6-2 | |
| WTA Belgrad | 07/28 11:20 | 26 | [122] Anna-Karolina Schmiedlova v Jule Niemeier [147] | 6-4,5-7,7-6 | |
| WTA Belgrad | 07/27 09:00 | 25 | [147] Jule Niemeier v Viktoriya Tomova [119] | 6-3,7-6 | |
| WTA Hamburg | 07/10 12:20 | 28 | [167] Jule Niemeier v Andrea Petkovic [130] | 6-7,6-4,5-7 | |
| WTA Hamburg | 07/09 14:55 | 27 | [167] Jule Niemeier v Tamara Zidansek [47] | 6-2,6-4 | |
| WTA Hamburg | 07/08 11:05 | 26 | [167] Jule Niemeier v Tamara Korpatsch [141] | 6-2,6-7,6-3 | |
| WTA Hamburg | 07/07 12:55 | 25 | [76] Caroline Garcia v Jule Niemeier [167] | 4-6,2-6 | |
| Wimbledon - Kobiety | 06/24 14:30 | 19 | [168] Jule Niemeier v Lesley Pattinama Kerkhove [175] | 4-6,6-2,7-9 | |
| Wimbledon - Kobiety | 06/23 15:45 | 15 | [117] Mayar Sherif v Jule Niemeier [168] | 4-6,3-6 | |
| Wimbledon - Kobiety | 06/22 16:35 | 14 | [167] Natalia Vikhlyantseva v Jule Niemeier [168] | 6-3,3-6,4-6 | |
| WTA Berlin | 06/14 11:50 | 25 | [12] Belinda Bencic v Jule Niemeier [167] | 4-6,6-4,7-5 | |
| WTA Berlin | 06/13 10:45 | 19 | [170] Jule Niemeier v Claire Liu [130] | 7-6,6-1 | |
| WTA Berlin | 06/12 11:20 | 14 | [75] Ann Li v Jule Niemeier [170] | 3-6,6-7 |