 Indonesia: M25 Jakarta 3 - Doubles - Main |
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| 1/8-finals | Barki J./Sijsling I. | Alcantara F. C./Isaro P. | 0:2 (5:7, 5:7) | details | 27.04.2023 |
| Indonesia: M25 Jakarta 2 - Doubles - Main |
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| Semi-finals | Barki J./Sijsling I. | Alcantara F. C./Isaro P. | WO. | details | 21.04.2023 |
| Quarter-finals | Barki J./Sijsling I. | Han Seon Yong/Shin S. | 2:0 (6:2, 7:64) | details | 20.04.2023 |
| 1/8-finals | Romios M. C./Walkin B. | Barki J./Sijsling I. | 1:2 (3:6, 6:4, 8:10) | details | 19.04.2023 |
| Indonesia: M25 Jakarta - Doubles - Main |
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| Quarter-finals | Barki J./Sijsling I. | Alcantara F. C./Isaro P. | 1:2 (3:6, 6:2, 9:11) | details | 13.04.2023 |
| 1/8-finals | Barki J./Sijsling I. | Erel Y./Habib H. | 2:0 (6:4, 6:1) | details | 12.04.2023 |
 Singapore: M15 Singapore - Doubles - Main |
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| Final | Barki J./Sijsling I. | Alcantara F. C./Sun F. | 2:0 (6:1, 6:1) | details | 08.04.2023 |
| Semi-finals | Barki J./Sijsling I. | Samrej K./Suksumrarn T. | 2:1 (7:5, 3:6, 10:8) | details | 07.04.2023 |
| Quarter-finals | Barki J./Sijsling I. | Hobbs R./Kelly D. | 2:0 (6:2, 6:4) | details | 06.04.2023 |
| 1/8-finals | Ho R./Stevenson K. | Barki J./Sijsling I. | 0:2 (4:6, 4:6) | details | 04.04.2023 |
 Portugal: Lisbon - Doubles - Main |
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| 1/8-finals | Faria J./Faria L. | Sijsling I./Smits G. | 2:0 (6:4, 6:3) | details | 29.09.2021 |
| Portugal: Braga - Doubles - Main |
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| Semi-finals | De Jong J./Stevens B. | Hermans M./Sijsling I. | 2:0 (6:1, 6:1) | details | 24.09.2021 |
| Quarter-finals | Hermans M./Sijsling I. | Heller P./Vanneste J. | 2:0 (6:4, 7:5) | details | 23.09.2021 |
| 1/8-finals | Hermans M./Sijsling I. | Arnaboldi A./Zeppieri G. | 2:1 (6:4, 2:6, 12:10) | details | 21.09.2021 |
 Czech Republic: Prague 3 - Doubles - Main |
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| 1/8-finals | Fallert F./Johnson H. | Sijsling I./Smits G. | 2:1 (6:1, 2:6, 10:4) | details | 25.08.2021 |
| Czech Republic: Prague 2 - Doubles - Main |
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| 1/8-finals | Karlovskiy E./Tiurnev E. | Sijsling I./Smits G. | 2:0 (6:3, 7:5) | details | 11.08.2021 |
 Spain: Pozoblanco - Doubles - Main |
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| Final | Sijsling I./van Rijthoven T. | Hidalgo D./Martos Gornes S. | 2:1 (5:7, 7:64, 10:5) | details | 24.07.2021 |
| Semi-finals | Sijsling I./van Rijthoven T. | Gabashvili T./Kadhe A. | WO. | details | 24.07.2021 |
| Quarter-finals | Andreev A./Jianu F. C. | Sijsling I./van Rijthoven T. | 0:2 (4:6, 2:6) | details | 22.07.2021 |
| 1/8-finals | Barrere G./Eysseric J. | Sijsling I./van Rijthoven T. | 1:0 RET. (6:4, 2:2) | details | 21.07.2021 |
 Germany: Braunschweig - Doubles - Main |
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| Semi-finals | Sabanov I./Sabanov M. | Sijsling I./Smits G. | 2:0 (6:1, 6:2) | details | 09.07.2021 |
| Quarter-finals | Hidalgo D./Martos Gornes S. | Sijsling I./Smits G. | 1:2 (6:4, 3:6, 8:10) | details | 08.07.2021 |
| 1/8-finals | Gabashvili T./Kadhe A. | Sijsling I./Smits G. | 0:2 (4:6, 5:7) | details | 06.07.2021 |
 Italy: Forli - Doubles - Main |
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| 1/8-finals | Lenz J./Moraing M. | Sijsling I./Smits G. | 2:1 (4:6, 7:62, 10:1) | details | 15.06.2021 |
 Croatia: Zadar - Doubles - Main |
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| Quarter-finals | Sijsling I./Vervoort M. | Sabanov I./Sabanov M. | 1:2 (4:6, 6:3, 8:10) | details | 25.03.2021 |
Romania: Iasi - Singles - Main
United Kingdom: Nottingham - Singles - Qualification
Serbia: Belgrade - Singles - Qualification