| Qatar Open XD | 11/07 08:20 | - | Yu-Jhun Li v Nina Mittelham | W | 0-3 | |
| Qatar Open XD | 10/07 14:55 | 1 | Nina Mittelham v Saki Shibata | L | 1-4 | |
| Qatar Open XD | 10/07 12:45 | 1 | Sun, Jiayi v Nina Mittelham | W | 1-3 | |
| Qatar Open XD | 10/07 08:00 | 1 | Nina Mittelham v Audrey Zarif | W | 3-0 | |
| Qatar Open XD | 10/06 13:20 | 1 | Nina Mittelham v Vermaas, Kim | W | 3-0 | |
| Qatar Open 2019, MS | 09/29 15:57 | - | Ying Han v Nina Mittelham | L | 3-0 | |
| Qatar Open XD | 09/19 13:00 | 1 | Nina Mittelham v Yidi Wang | L | 0-4 | |
| Qatar Open XD | 09/19 07:00 | 1 | Leitner, Selina v Nina Mittelham | W | 0-3 | |
| Qatar Open 2019, MS | 09/17 13:00 | 1 | Nina Mittelham v Bernadette Szocs | L | 1-3 | |
| Qatar Open 2019, MS | 09/16 09:00 | 1 | Nina Mittelham v Vermaas, Kim | L | 2-3 | |
| Qatar Open 2019, MS | 09/15 12:00 | 1 | Nina Mittelham v Natalia Partyka | W | 3-1 | |
| Qatar Open 2019, MS | 09/13 09:00 | 1 | Nina Mittelham v Linda Bergstrom | W | 3-0 | |
| Qatar Open XD | 08/24 11:30 | 5 | Nina Mittelham v Ekholm, Matilda | L | 3-4 | |
| Qatar Open XD | 08/23 16:30 | 1 | Adriana Diaz v Nina Mittelham | L | 3-1 | |
| Qatar Open XD | 08/23 07:00 | 1 | Nina Mittelham v Morizono, Mizuki | W | 3-1 | |
| Qatar Open XD | 08/22 18:50 | 1 | Nina Mittelham v Margo Degraef | W | 4-0 | |
| Qatar Open 2019, MS | 05/31 09:00 | 57 | Maria Xiao v Nina Mittelham | L | 4-0 | |
| Qatar Open XD | 01/18 12:52 | - | Nina Mittelham v Ye Lin | L | 2-3 | |
| Qatar Open XD | 01/17 17:33 | - | Nina Mittelham v Laurenti, Jamila | W | 4-2 | |
| Qatar Open XD | 12/13 18:29 | - | Ho, T. - T. v Nina Mittelham | W | 0-3 | |
| Qatar Open 2019, MS | 11/18 16:00 | 5 | Nina Mittelham v I-Ching Cheng | L | 0-4 | |
| Swedish Open (WTP) 2019, WS | 11/18 09:45 | 6 | Matsuzawa, Marina v Nina Mittelham | W | 3-4 | |
| Qatar Open XD | 11/17 14:03 | - | Nina Mittelham v Shiomi, Maki | L | 0-3 | |
| Qatar Open XD | 11/15 14:51 | - | Nina Mittelham v Holmsten, Ellen | W | 4-1 | |
| Qatar Open 2019, MS | 09/23 17:45 | - | Hamamoto, Yui v Nina Mittelham | L | 3-2 | |
| Qatar Open 2019, MS | 09/23 10:01 | - | Bernadette Szocs v Nina Mittelham | L | 3-2 | |
| Qatar Open 2019, MS | 09/22 17:47 | - | Loyen, Eline v Nina Mittelham | W | 0-3 | |
| Qatar Open 2019, MS | 09/22 15:59 | - | Nina Mittelham v Debora Vivarelli | W | 4-0 |