 Chile: M15 Concepcion 2 - Doubles - Main |
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| 1/8-finals | Fernandez Flores D./Schubert H. A. | Britto L./Saraiva Dos Santos P. A. | 0:2 (0:6, 3:6) | details | 11.12.2023 |
 Romania: M15 Curtea de Arges - Doubles - Main |
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| Semi-finals | Filip V./Vanta V. | Bruna N./Schubert H. A. | 2:0 (6:4, 6:0) | details | 11.08.2023 |
| Quarter-finals | Bruna N./Schubert H. A. | Kalender A./Palosi S. | WO. | details | 10.08.2023 |
| 1/8-finals | Bruna N./Schubert H. A. | Dumitru A./Manda C. | 2:0 (6:3, 6:4) | details | 08.08.2023 |
| Romania: M25 Pitesti - Doubles - Main |
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| 1/8-finals | Bogo E./Schubert H. A. | Britto L./Saraiva Dos Santos P. A. | 1:2 (6:2, 3:6, 6:10) | details | 01.08.2023 |
| Romania: M25+H Bacau - Doubles - Main |
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| 1/8-finals | Denolly C./Jucha W. | Baiant R./Schubert H. A. | 2:1 (5:7, 6:3, 10:7) | details | 27.07.2023 |
 Germany: M15 Kamen - Doubles - Main |
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| 1/8-finals | Egea F. E./Schubert H. A. | Frawley J./Gentzsch T. | 1:2 (4:6, 7:67, 9:11) | details | 27.06.2023 |
 North Macedonia: M25 Skopje - Doubles - Main |
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| Semi-finals | Schinas S./Schubert H. A. | Gueymard Wayenburg S./Hoang A. | 0:2 (1:6, 0:6) | details | 09.06.2023 |
| Quarter-finals | Schinas S./Schubert H. A. | Basic M./Zekic M. | 0:0 RET. (4:3) | details | 08.06.2023 |
| 1/8-finals | Huseinovic E./Stoilkovski M. | Schinas S./Schubert H. A. | 0:2 (63:7, 3:6) | details | 06.06.2023 |
 Egypt: M15 Cairo 6 - Doubles - Main |
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| 1/8-finals | Montes De Oca Murillo R. N./Schubert H. A. | Aboian L./Aboian V. | 0:2 (0:6, 0:6) | details | 03.05.2022 |
 Turkey: M15 Antalya 34 - Doubles - Main |
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| 1/8-finals | Abibsi A./Turknas D. | Lopez N./Schubert H. A. | 2:1 (3:6, 6:2, 12:10) | details | 30.11.2021 |
| Turkey: M15 Antalya 33 - Doubles - Main |
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| 1/8-finals | Alosha Ushakov N./Osborne Z. | Rengel Sierra T./Schubert H. A. | 2:1 (7:5, 4:6, 10:5) | details | 25.11.2021 |
 Spain: M15 Torello - Doubles - Main |
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| 1/8-finals | Deschamps A./Dussin L. | Saura Moragrega M./Schubert H. A. | 2:0 (6:1, 6:1) | details | 02.11.2021 |
| Spain: M15 Madrid - Doubles - Main |
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| 1/8-finals | Sakellaridis M./Sakellaridis S. | Lopez N./Schubert H. A. | 2:1 (5:7, 6:4, 10:7) | details | 26.10.2021 |
 Portugal: M25 Sintra 2 - Doubles - Main |
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| 1/8-finals | Binding J./Falcao G. | Gibbens J./Schubert H. A. | 2:0 (6:2, 6:2) | details | 16.09.2021 |
| Spain: M15 Torello - Doubles - Main |
|---|
| 1/8-finals | Monclus Matamala M./Pasqual L. | Schubert H. A./Stepanian A. | 2:1 (7:63, 3:6, 10:8) | details | 08.12.2020 |
| Egypt: M15 Sharm El Sheikh 14 - Doubles - Main |
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| 1/8-finals | Gomaa M./Schubert H. A. | Deviatiarov M./Vilardo F. | 0:2 (2:6, 4:6) | details | 17.11.2020 |
