| European Championships WD | 04/26 16:15 | 5 | 질 D / 시넨 C v Muller / Stadelmann | L | 2-0 | |
| Dutch Int. WD | 04/14 17:40 | - | Muller / Stadelmann v Ng/Tsang | L | 0-2 | |
| Orleans Masters WD | 03/31 13:00 | 4 | Macpherson J / Torrance C v Muller / Stadelmann | L | 2-0 | |
| Orleans Masters WD | 03/30 14:00 | 5 | Muller / Stadelmann v Cloteaux-Foucault/Nambot | W | 2-0 | |
| Swiss Open WD | 03/23 15:00 | - | Ponnappa A / Reddy B S v Muller / Stadelmann | L | 2-0 | |
| World Championships WD | 12/15 08:35 | 6 | Muller / Stadelmann v 김 S Y / 공 H Y | L | 0-2 | |
| World Championships WD | 12/13 08:55 | 6 | Frost K / Ryan M v Muller / Stadelmann | W | 0-2 | |
| Hylo Open WD | 11/03 08:45 | 5 | Muller / Stadelmann v 안토니센 N P / 그레이브슨 C | - | Retired | |
| Dutch Open WD | 10/16 08:00 | - | Muller / Stadelmann v Magnusson/Nistad | L | 0-2 | |
| Dutch Open WD | 10/15 15:10 | - | Muller / Stadelmann v 오 영 S / 호흐마이어 K | W | 2-1 | |
| Dutch Open WD | 10/14 18:25 | - | Muller / Stadelmann v Lammertyn/Laurens | W | 2-0 | |
| Spain Int WD | 06/18 15:05 | - | 로페즈 P / 유슬레 L v Muller / Stadelmann | L | 2-0 | |
| Spain Int WD | 06/18 10:45 | - | Muller / Stadelmann v 오 영 S / 호흐마이어 K | W | 2-0 | |
| Spain Int WD | 06/17 16:20 | - | Muller / Stadelmann v Alonso/Ibanez | W | 2-0 | |
| Austrian Open WD | 05/30 08:00 | - | Istarani/Kani v Muller / Stadelmann | L | 2-0 | |
| Austrian Open WD | 05/29 16:00 | - | Muller / Stadelmann v Jaques/Lammertyn | W | 2-0 | |
| Austrian Open WD | 05/29 09:40 | - | Muller / Stadelmann v Cheng S H / Cheng S Y | W | 2-0 | |
| Portuguese Int. WD | 05/08 15:20 | 1 | 안토니센 N P / 그레이브슨 C v Muller / Stadelmann | L | 2-0 | |
| Portuguese Int. WD | 05/08 10:00 | 1 | Muller / Stadelmann v De Wit/Kelly van Buiten | W | 2-0 | |
| European Championships WD | 04/30 15:20 | 3 | Fruergaard / Thyges. v Muller / Stadelmann | L | 2-0 | |
| European Championships WD | 04/29 13:00 | - | 레펠 E / 트란 A v Muller / Stadelmann | W | 1-2 | |
| European Championships WD | 04/29 11:00 | 4 | 레펠 E / 트란 A v Muller / Stadelmann | W | 1-2 | |
| European Championships WD | 04/27 10:50 | 1 | 비트수코바 J / 비아비츠카야 M v Muller / Stadelmann | W | 0-2 | |
| SaarLorLux Open 2019, WD | 10/27 09:00 | 5 | Muller / Stadelmann v Schmidt/Zoe Sinico | - | Walkover | |
| Austrian Open WD | 02/21 12:20 | 4 | Muller / Stadelmann v 최 C / 우 J | L | 0-2 | |
| Austrian Open WD | 02/20 17:15 | 5 | Muller / Stadelmann v Lundgaard S / Paredes C | W | 2-1 | |
| Swedish Open WD | 01/17 12:00 | - | 보아룬 A / 이아코블레바 A v Muller / Stadelmann | L | 2-0 | |
| Welsh Int. WD | 11/29 18:30 | - | Muller / Stadelmann v O Donnell E / Sidebottom S | W | 2-1 | |
| Slovenia Future Series WD | 11/23 16:30 | - | 쿠드스크 A C / 멜가드 E v Muller / Stadelmann | L | 2-1 | |
| Slovenia Future Series WD | 11/23 11:40 | - | Polanc P / Stankovic K v Muller / Stadelmann | W | 1-2 |