| World Championships MD | 12/13 11:10 | 6 | Flaatten/Rikheim v Birker P / Stipsits D | L | 2-0 | |
| Welsh Int MD | 12/02 19:40 | - | Kral/Mendrek v Birker P / Stipsits D | L | 2-1 | |
| Czech Open MD | 10/22 17:40 | - | Birker P / Stipsits D v Beh/Goh | L | 1-2 | |
| Dutch Open MD | 10/14 14:50 | - | Birker P / Stipsits D v Gupta/Yap | L | 0-2 | |
| Polish Int. MD | 09/25 12:00 | - | Birker P / Stipsits D v Filimon/Pratama | L | 0-2 | |
| Ukraine Int. MD | 09/09 09:00 | - | Birker P / Stipsits D v Adam/Lovang | L | 0-2 | |
| Spain Int MD | 06/18 15:15 | - | Birker P / Stipsits D v Man/Tee | L | 0-2 | |
| Spain Int MD | 06/18 11:15 | - | Birker P / Stipsits D v Molares J / Perez J | W | 2-0 | |
| Austrian Open MD | 05/28 15:00 | - | Birker P / Stipsits D v Matusz M / Trecki W | L | 1-2 | |
| Slovenia Int. MD | 05/22 10:00 | 2 | Birker P / Stipsits D v Boe/Faust Kjaer | L | 0-2 | |
| Slovenia Int. MD | 05/21 15:20 | 3 | Birker P / Stipsits D v Ivancic/Krapez | W | 2-1 | |
| Slovenia Int. MD | 05/21 11:20 | 4 | Birker P / Stipsits D v Doder A / Tomic M | W | 2-0 | |
| Slovenia Int. MD | 05/20 16:40 | - | Birker P / Stipsits D v Feltes/Pauquet | W | 2-0 | |
| Portuguese Int. MD | 05/08 09:40 | 1 | Birker P / Stipsits D v Easton/Russ | L | 0-2 | |
| Championnat d'Europe - Doubles Hommes | 04/29 10:20 | 4 | Birker P / Stipsits D v Ivanov V / Sozonov I | L | 0-2 | |
| Championnat d'Europe - Doubles Hommes | 04/27 10:10 | 1 | Birker P / Stipsits D v Druzchenko I / Kolesnik O | W | 2-0 | |
| Orleans Masters MD | 03/24 17:45 | 5 | Birker P / Stipsits D v Hess D / Pistorius J | L | 0-2 | |
| Open de Suisse - Doubles Hommes | 03/03 09:35 | 5 | Birker P / Stipsits D v Popov/Popov | L | 0-2 | |
| Euro Mixed Team Champs MD | 12/12 17:00 | - | Birker P / Stipsits D v Antoska A / Horak J | W | 2-0 | |
| Euro Mixed Team Champs MD | 12/11 18:30 | - | Kweekel/Lecq v Birker P / Stipsits D | W | 1-2 | |
| Euro Mixed Team Champs MD | 12/10 18:15 | - | Kral O / Louda J v Birker P / Stipsits D | W | 1-2 | |
| SaarLorLux Open 2019, MD | 10/27 15:45 | 7 | Dunn/Hall v Birker P / Stipsits D | L | 2-0 | |
| European Team Championships MD | 02/12 19:30 | - | Birker P / Stipsits D v Smilowski P / Szydlowski P | L | 0-2 | |
| Italian Int. MD | 12/13 12:55 | - | Adam / Maio v Birker P / Stipsits D | L | 2-0 | |
| Slovenia Future Series MD | 11/23 11:05 | - | Knudsen K / Munk M T v Birker P / Stipsits D | L | 2-1 | |
| Slovenia Future Series MD | 11/22 20:00 | - | Borgstedt J / Yap K Q v Birker P / Stipsits D | W | 0-2 | |
| Irish Open MD | 11/14 21:15 | 4 | Grimley/Grimley v Birker P / Stipsits D | L | 2-0 | |
| Irish Open MD | 11/14 13:45 | 5 | Birker P / Stipsits D v Ashton D / Hull T | W | 2-0 | |
| Hungarian Int. MD | 11/01 11:40 | 4 | Olesen / Soenderg. v Birker P / Stipsits D | L | 2-0 | |
| Bulgarian Int. MD | 10/06 09:00 | - | Birker P / Stipsits D v Monnberg A / Paul J | W | 2-1 |