| Dutch Int. Qual | 2019/04/11 07:30 | Colin Hammarberg v Martin Bundgaard | L | 1-2 |
| Giraldilla Int. XD | 2019/02/20 03:20 | Saran Jamsri v Colin Hammarberg | L | 2-0 |
| Swiss Open WD Qual | 2019/01/17 10:30 | Colin Hammarberg v Mikkel Enghoj | W | 2-1 |
| Swiss Open WD Qual | 2019/01/10 15:00 | Colin Hammarberg v Talar Laa | L | 0-2 |
| Giraldilla Int. XD | 2018/11/30 11:00 | Samuel O'Brien Ricketts v Colin Hammarberg | W | 0-2 |
| Swiss Open WD Qual | 2018/11/29 09:20 | Colin Hammarberg v David King | W | 2-1 |
| Swiss Open WD Qual | 2018/11/28 15:00 | Cholan Kayan v Colin Hammarberg | W | 0-2 |
| Swiss Open WD Qual | 2018/11/28 11:30 | Alex Marritt v Colin Hammarberg | W | 0-2 |
| Lithuanian Int. Qual | 2019/06/07 06:00 | Brian Holtschke v Mateusz Dubowski | W | 0-2 |
| Latvia Int. | 2019/05/31 16:30 | Aram Mahmoud v Mateusz Dubowski | L | 2-0 |
| Latvia Int. Qual | 2019/05/31 06:00 | Michael Giesinger v Mateusz Dubowski | W | 0-2 |
| Latvia Int. Qual | 2019/05/30 15:00 | Tony Lindelof v Mateusz Dubowski | W | 0-2 |
| Polish Open Qual | 2019/03/28 11:00 | Mateusz Dubowski v Antonio Li | W | 2-0 |
| Swiss Open WD Qual | 2019/02/27 07:00 | Mateusz Dubowski v Andreas Hoffmann | W | 2-0 |
| Swiss Open WD Qual | 2017/09/27 14:10 | Adi Pratama v Mateusz Dubowski | L | 2-1 |
| All England Open | 2017/08/22 10:30 | Mateusz Dubowski v Anthony Sinisuka Ginting | L | 0-2 |