| Welsh Int. XD | 12/01 17:20 | - | Mairs/Mairs v Smilowski P / Swierczynska M | L | 2-0 | |
| Welsh Int. XD | 12/01 11:00 | - | Smilowski P / Swierczynska M v Adam/Bauer | W | 2-0 | |
| Welsh Int. XD | 11/30 11:40 | - | Smilowski P / Swierczynska M v Buijk/van Buiten | W | 2-0 | |
| Polish Int. XD | 09/23 07:00 | - | Smilowski P / Swierczynska M v van Leeuwen/Lado | L | 0-2 | |
| Polish Int. XD | 09/22 11:40 | - | Smilowski P / Swierczynska M v Pham/Muller | W | 2-0 | |
| European Games XD | 06/30 09:00 | - | Ellis/Smith v Smilowski P / Swierczynska M | L | 2-0 | |
| Austrian Open XD | 05/27 15:00 | - | van Leeuwen/Lado v Smilowski P / Swierczynska M | L | 2-0 | |
| Austrian Open XD | 05/27 08:00 | - | Smilowski P / Swierczynska M v Hoareau/Desmots-Chacun | W | 2-0 | |
| Austrian Open XD | 05/26 11:20 | - | Malik Bourakkadi/Michalski v Smilowski P / Swierczynska M | W | 1-2 | |
| Luxembourg Open XD | 05/05 08:20 | - | Renoir/Margueritte v Smilowski P / Swierczynska M | L | 2-1 | |
| Dutch Int. - Doubles Mixtes | 04/14 16:25 | - | Smilowski P / Swierczynska M v Su/Lee | L | 0-2 | |
| International du Portugal Doubles Mixtes | 03/12 09:00 | - | Sondergaard/Bergstein v Smilowski P / Swierczynska M | L | 2-0 | |
| International du Portugal Doubles Mixtes | 03/11 15:00 | - | Wang/Yu v Smilowski P / Swierczynska M | W | 0-2 | |
| International du Portugal Doubles Mixtes | 03/11 09:00 | - | Smilowski P / Swierczynska M v Guildea/Noble | W | 2-0 | |
| International du Portugal Doubles Mixtes | 03/10 15:10 | - | Pringle/Andrew v Smilowski P / Swierczynska M | W | 0-2 | |
| Championnat d'Europe - Doubles Mixtes | 04/29 07:00 | 4 | Christiansen M / Boeje A v Smilowski P / Swierczynska M | L | 2-0 | |
| Championnat d'Europe - Doubles Mixtes | 04/28 08:00 | 1 | Laanes M / Ruutel H v Smilowski P / Swierczynska M | W | 0-2 | |
| Open de Pologne - Doubles Mixtes | 03/26 15:30 | 4 | Trecki/Kwasnik v Smilowski P / Swierczynska M | - | Walkover | |
| Portuguese Int. XD | 11/07 16:00 | 2 | Smilowski P / Swierczynska M v Grimley C / O Donnell E | L | 0-2 | |
| Portuguese Int. XD | 11/07 09:30 | 3 | Smilowski P / Swierczynska M v Orteu Y / Stadelmann J | W | 2-0 | |
| Portuguese Int. XD | 11/06 13:40 | - | Smilowski P / Swierczynska M v Anjo/Setim | W | 1-0 | |
| SaarLorLux Open 2019, XD | 10/28 15:30 | 7 | Smilowski P / Swierczynska M v Tabeling/Piek | L | 0-2 | |
| Austrian Open XD | 02/21 16:00 | 3 | Lu M C / Wu T J v Smilowski P / Swierczynska M | L | 2-0 | |
| Austrian Open XD | 02/21 09:00 | 4 | Dunn A / Torrance C v Smilowski P / Swierczynska M | W | 0-2 | |
| Austrian Open XD | 02/20 12:30 | 5 | Stoffersen / Ekelund v Smilowski P / Swierczynska M | W | 0-2 | |
| Italian Int. XD | 12/13 13:30 | - | Smilowski P / Swierczynska M v Mairs G / Williams V | L | 0-2 | |
| Italian Int. XD | 12/13 08:30 | - | Espersen R / Busch C v Smilowski P / Swierczynska M | W | 1-2 | |
| Dutch Open XD | 10/08 13:40 | 5 | Chen K / Dong W J v Smilowski P / Swierczynska M | L | 2-1 | |
| Polish Int. XD | 09/21 08:00 | 4 | Smilowski P / Swierczynska M v Christensen M E / Karlsson E | L | 0-2 | |
| Polish Int. XD | 09/20 07:00 | 5 | Smilowski P / Swierczynska M v Pahatouridis/Grodynska | W | 2-0 |