| Lithuanian Int. Qual | 2019/06/06 14:30 | Dauskurtas, Kazimieras v Sibbald, Thomas | W | 0-2 |
| Latvia Int. Qual | 2019/05/30 11:30 | Sibbald, Thomas v Tony Lindelof | L | 0-2 |
| Latvia Int. Qual | 2019/05/30 07:30 | Sibbald, Thomas v Jack Taylor | W | 2-1 |
| Dutch Int. - Qualif. | 2019/04/11 07:30 | Edison, Keith Mark v Sibbald, Thomas | L | 2-1 |
| Open de Suisse - Doubles Femmes - Qualif. | 2018/12/13 12:00 | Alcala, Alejandro v Sibbald, Thomas | L | 2-0 |
| Open de Suisse - Doubles Femmes - Qualif. | 2018/11/14 12:00 | Abildgaard, Patrick v Sibbald, Thomas | L | 2-0 |
| Giraldilla Int. XD | 2017/04/20 11:04 | Sibbald, Thomas v Nicolaou, Elias | L | 0-2 |
| Giraldilla Int. XD | 2017/04/12 10:41 | Sibbald, Thomas v Lavrikov, Mikhail | L | 1-2 |
| Hellas Open | 2019/08/09 07:00 | Wolfgang Gnedt v Elias Bracke | W | 2-0 |
| White Nights | 2019/07/11 10:30 | Wolfgang Gnedt v Ivan Rusev | W | 2-1 |
| Spanish Int. Qual | 2019/06/12 13:30 | Heino, Iikka v Wolfgang Gnedt | L | 2-0 |
| Slovenia Int. Qual | 2019/05/15 08:00 | Wolfgang Gnedt v Fabio Caponio | W | 2-1 |
| Croatian Int. | 2019/04/19 07:30 | Fabio Caponio v Wolfgang Gnedt | L | 2-0 |
| Orleans Masters Qual | 2019/03/19 09:55 | Fabio Caponio v Wolfgang Gnedt | L | 2-0 |
| Open de Suisse - Doubles Femmes - Qualif. | 2019/02/21 09:10 | Ramlie, Yonathan v Wolfgang Gnedt | L | 2-0 |
| Giraldilla Int. XD | 2018/11/29 13:00 | Wolfgang Gnedt v Tsai, Andy | L | 1-2 |