| WTA - Linz | 01/29 16:05 | 19 | [138] Nuria Parrizas-Diaz v Jule Niemeier [159] | 3-6,1-6 | |
| WTA - Linz | 01/28 19:05 | 14 | [163] Jule Niemeier v Harriet Dart [112] | 7-6,6-2 | |
| Australian Open - Kvinder | 01/11 01:20 | 15 | [98] Renata Zarazua v Jule Niemeier [163] | 6-4,5-7,7-6 | |
| Australian Open - Kvinder | 01/09 07:25 | 14 | [163] Jule Niemeier v Anastasia Tikhonova [153] | 6-7,6-4,6-2 | |
| WTA - Auckland | 12/30 23:35 | 19 | [128] Elena-Gabriela Ruse v Jule Niemeier [165] | 6-0,3-6,6-3 | |
| WTA - Auckland | 12/30 03:10 | 45 | [215] Elysia Bolton v Jule Niemeier [165] | 3-6,4-6 | |
| Billie Jean King Cup | 11/10 09:00 | - | [61] Clara Burel v Jule Niemeier [162] | 6-4,6-3 | |
| ITF W60 - Bratislava | 11/02 10:00 | 27 | [175] Jule Niemeier v Lea Boskovic [243] | 1-6,7-6,2-6 | |
| ITF W60 - Bratislava | 11/01 09:05 | 26 | [175] Jule Niemeier v Ayla Aksu [439] | 6-1,7-5 | |
| ITF W60 - Bratislava | 10/31 09:00 | 25 | [175] Jule Niemeier v Martyna Kubka [443] | Retired | |
| ITF W60 - Glasgow | 10/25 14:20 | 25 | [175] Jule Niemeier v Valentina Ryser [370] | 3-6,1-6 | |
| WTA - Guangzhou | 09/18 09:45 | 25 | [155] Harriet Dart v Jule Niemeier [136] | 6-3,6-2 | |
| WTA - Osaka | 09/12 04:40 | 25 | [136] Jule Niemeier v Anna Kalinskaya [92] | 4-6,4-6 | |
| ITF - W100 Tokyo | 09/07 05:10 | 27 | [111] Kimberly Birrell v Jule Niemeier [91] | 6-4,6-3 | |
| ITF - W100 Tokyo | 09/06 02:00 | 26 | [189] Ankita Raina v Jule Niemeier [91] | 2-6,7-5,6-7 | |
| ITF - W100 Tokyo | 09/04 03:45 | 25 | [173] Moyuka Uchijima v Jule Niemeier [91] | 2-6,4-6 | |
| US Open - Kvinder | 08/23 20:20 | 14 | [89] Jule Niemeier v Despina Papamichail [193] | 3-6,4-6 | |
| WTA - Kozerki | 08/08 14:00 | 25 | [94] Jule Niemeier v Maja Chwalinska [420] | 6-4,2-6,3-6 | |
| WTA - Prag | 08/02 09:00 | 26 | [101] Jule Niemeier v Kateryna Baindl [98] | Retired | |
| WTA - Prag | 08/01 13:55 | 25 | [134] Heather Watson v Jule Niemeier [101] | 2-6,3-6 | |
| WTA - Hamborg | 07/27 09:00 | 27 | [106] Jule Niemeier v Daria Saville [225] | 3-6,2-6 | |
| WTA - Hamborg | 07/26 09:00 | 26 | [58] Yulia Putintseva v Jule Niemeier [106] | 7-5,3-6,1-6 | |
| WTA - Hamborg | 07/24 13:40 | 25 | [309] Ella Seidel v Jule Niemeier [106] | 6-7,6-1,3-6 | |
| Wimbledon - Kvinder | 07/07 10:00 | 24 | [103] Jule Niemeier v Dalma Galfi [126] | 6-4,6-7,1-6 | |
| Wimbledon - Kvinder | 07/06 10:00 | 23 | [16] Karolina Muchova v Jule Niemeier [103] | 4-6,7-5,1-6 | |
| WTA - Berlin | 06/22 10:30 | 26 | [53] Marketa Vondrousova v Jule Niemeier [120] | Retired | |
| WTA - Berlin | 06/20 15:00 | 25 | [120] Jule Niemeier v Ons Jabeur [6] | 7-6,6-4 | |
| WTA - Berlin | 06/18 13:00 | 19 | [118] Jule Niemeier v Greet Minnen [120] | 7-6,3-6,6-2 | |
| WTA - Berlin | 06/17 10:15 | 45 | [118] Jule Niemeier v Noma Noha Akugue [215] | 4-6,6-2,6-3 | |
| WTA - Nottingham | 06/12 13:45 | 25 | [118] Jule Niemeier v Heather Watson [195] | 4-6,3-6 |