| Croatia Open | 06/21 15:05 | - | Thakur, Siddharath v Aaron Sonnenschein | L | 0-2 | |
| Bonn Int. | 06/16 13:00 | - | Samuel Hsiao v Thakur, Siddharath | L | 2-0 | |
| Lithuanian Int. | 06/10 09:45 | - | Thakur, Siddharath v Sulistio Tegar | L | 1-2 | |
| Dutch Int. - | 04/14 09:00 | - | Ivan Rusev v Thakur, Siddharath | L | 2-0 | |
| Syed Modi International 2019, MS, Qualification | 11/26 03:30 | - | Aryamann Tandon v Thakur, Siddharath | L | 2-0 | |
| Hungarian Int. | 11/01 15:00 | 3 | Messerschmidt, Rasmus v Thakur, Siddharath | L | 2-0 | |
| Hungarian Int. | 11/01 11:00 | 4 | Thakur, Siddharath v Malkov, Vladimir | W | 2-1 | |
| Hungarian Int. | 10/31 14:10 | 5 | Miha Ivancic v Thakur, Siddharath | W | 1-2 | |
| Polish Int. | 09/21 11:20 | 4 | Harry Huang v Thakur, Siddharath | L | 2-0 | |
| Polish Int. | 09/20 13:40 | 5 | Savin, Cristian v Thakur, Siddharath | W | 0-2 | |
| Belgian International 2019, MS | 09/12 10:40 | 5 | Thakur, Siddharath v Moreels, Maxime | L | 0-2 | |
| Hyderabad Open 2019, MS | 08/06 13:30 | 6 | Thakur, Siddharath v Heo, Kwang Hee | L | 0-2 | |
| Vietnam Int. | 04/09 09:30 | - | Goh, Giap Chin v Thakur, Siddharath | L | 2-0 | |
| Open d'Inde | 03/27 11:30 | 5 | Thakur, Siddharath v Avihingsanon, Suppanyu | L | 1-2 | |
| India Open 2019, MS, Qualification | 03/26 08:15 | - | Dhaliwal, Gurpartap Singh v Thakur, Siddharath | W | 0-2 | |
| Giraldilla Int. XD | 11/21 07:30 | 5 | Thakur, Siddharath v Kholik, Firman Abdul | L | 0-2 | |
| Giraldilla Int. XD | 09/04 13:30 | 6 | Goh, Giap Chin v Thakur, Siddharath | L | 2-1 | |
| Open de Suisse - Doubles Femmes - Qualif. | 08/07 06:50 | - | Yu Jen Chi v Thakur, Siddharath | L | 2-0 | |
| Indonesia Masters XD | 08/01 04:40 | 6 | Cheuk Yiu Lee v Thakur, Siddharath | L | 2-0 | |
| Indonesia Masters XD | 07/19 06:20 | 5 | Grachev, Denis v Thakur, Siddharath | L | 3-1 | |
| Indonesia Masters XD | 06/27 12:10 | 6 | Thakur, Siddharath v Avihingsanon, Suppanyu | L | 0-2 |