| Australian Open 2019, WS | 07/11 05:00 | 5 | Sato, Hitomi v Nina Mittelham | L | 4-1 | |
| Australian Open 2019, WS | 07/10 04:40 | - | Nina Mittelham v Ying Han | W | 4-1 | |
| Korea Open 2019, WS | 07/04 09:40 | 5 | Nina Mittelham v Hoi Kem Doo | L | 0-4 | |
| Korea Open 2019, WS | 07/03 10:40 | - | Hana Matelova v Nina Mittelham | W | 1-4 | |
| European Games Team Women | 06/28 09:00 | - | Nina Mittelham v Li, Qian | W | 3-2 | |
| ITTF China Open 2019, WS | 05/30 07:15 | 5 | Nina Mittelham v Kim, Song I | L | 3-4 | |
| World Championship Women | 04/23 16:10 | 6 | I-Ching Cheng v Nina Mittelham | L | 4-1 | |
| World Championship Women | 04/23 09:40 | 57 | Avameri, Airi v Nina Mittelham | W | 1-4 | |
| Qatar Open XD | 03/27 12:30 | - | Nina Mittelham v Ho Ching Lee | L | 0-4 | |
| Qatar Open XD | 03/26 08:30 | - | Nina Mittelham v Odorova, Eva | W | 4-2 | |
| Qatar Open 2019, MS | 02/02 17:15 | 3 | Sofia Polcanova v Nina Mittelham | L | 4-2 | |
| Qatar Open 2019, MS | 02/02 10:25 | 4 | Nina Mittelham v Ekholm, Matilda | W | 4-1 | |
| Qatar Open 2019, MS | 01/25 18:31 | - | Natalia Partyka v Nina Mittelham | W | 1-3 | |
| Qatar Open XD | 01/15 12:20 | 1 | Bernadett Balint v Nina Mittelham | W | 0-4 | |
| Qatar Open XD | 10/26 16:15 | - | Nina Mittelham v Yubin Shin | L | 1-4 | |
| Qatar Open 2019, MS | 09/22 10:45 | 4 | Bernadette Szocs v Nina Mittelham | L | 4-0 | |
| Qatar Open 2019, MS | 09/21 12:50 | 5 | Pergel, Szandra v Nina Mittelham | W | 0-4 | |
| Qatar Open 2019, MS | 09/20 14:30 | 6 | Sabina Surjan v Nina Mittelham | W | 2-4 | |
| République tchèque - Extraleague | 08/17 12:00 | 4 | Nina Mittelham v Miu Hirano | L | 0-4 | |
| République tchèque - Extraleague | 08/16 10:50 | 5 | Ekholm, Matilda v Nina Mittelham | W | 2-4 | |
| Qatar Open XD | 05/29 08:40 | 1 | Nina Mittelham v Jung, Yumi | - | Retired | |
| Qatar Open 2019, MS | 05/02 15:00 | 1 | Amelie Solja v Nina Mittelham | W | 2-3 | |
| Qatar Open 2019, MS | 05/01 18:00 | 1 | Nina Mittelham v Tamolwan Khetkhuan | W | 3-0 | |
| Qatar Open 2019, MS | 04/30 14:30 | 1 | Nina Mittelham v Hoi Kem Doo | L | 0-3 | |
| Qatar Open 2019, MS | 04/29 19:00 | 1 | Yang, Haeun v Nina Mittelham | W | 2-3 | |
| Qatar Open 2019, MS | 04/29 09:00 | 1 | Nina Mittelham v Yamada, Jessica | W | 3-1 | |
| Qatar Open XD | 01/18 17:20 | 5 | Jian Zeng v Nina Mittelham | L | 4-3 | |
| Qatar Open XD | 01/17 16:40 | 1 | Lee, I-Chen v Nina Mittelham | W | 3-4 | |
| Qatar Open XD | 11/07 16:20 | 1 | Li, Jie v Nina Mittelham | W | 2-4 | |
| Qatar Open XD | 11/07 10:29 | - | Miyu Nagasaki v Nina Mittelham | L | 4-1 |