Tunisia: M15 Monastir 15 - Doubles - Main |
| Final | Istomin D./Karlovskiy E. | Davis J./Hussey G. | WO. | details | 13.04.2024 |
| Semi-finals | Istomin D./Karlovskiy E. | Pokorny L./Wiskandt M. | 2:1 (2:6, 7:62, 10:5) | details | 12.04.2024 |
| Quarter-finals | Istomin D./Karlovskiy E. | Lumsden E./Parker S. | 2:0 (7:65, 6:1) | details | 11.04.2024 |
| 1/8-finals | Donski A./Pereira T. | Istomin D./Karlovskiy E. | 1:2 (6:1, 4:6, 9:11) | details | 09.04.2024 |
Kazakhstan: M15 Aktobe 2 - Doubles - Main |
| Quarter-finals | Kukasian A./Nesterov P. | Istomin D./Karlovskiy E. | 2:1 (6:3, 2:6, 10:2) | details | 14.03.2024 |
| 1/8-finals | Istomin D./Karlovskiy E. | Batyutenko M./Yerdilda Y. | 2:0 (6:3, 6:2) | details | 12.03.2024 |
Kazakhstan: M15 Aktobe - Doubles - Main |
| 1/8-finals | Kukasian A./Nesterov P. | Istomin D./Karlovskiy E. | 2:1 (6:4, 4:6, 10:7) | details | 05.03.2024 |
Qatar: M25 Doha - Doubles - Main |
| 1/8-finals | Istomin D./Karlovskiy E. | Erel Y./Kirkin E. | WO. | details | 15.01.2024 |
Qatar: M15 Doha - Doubles - Main |
| Semi-finals | Benchetrit E./Ghibaudo A. | Istomin D./Karlovskiy E. | 1:0 RET. (6:2, 0:0) | details | 12.01.2024 |
| Quarter-finals | Istomin D./Karlovskiy E. | Genier T./Trochu P. | 2:0 (6:4, 6:2) | details | 11.01.2024 |
| 1/8-finals | Istomin D./Karlovskiy E. | Zayid M. S./Virgili A. | 2:0 (6:3, 6:0) | details | 09.01.2024 |
Italy: Ortisei - Doubles - Main |
| Quarter-finals | Istomin D./Karlovskiy E. | Cukierman D./Paris J. | WO. | details | 27.10.2023 |
| 1/8-finals | Istomin D./Karlovskiy E. | Walkow S./Zuk K. | 2:1 (6:4, 0:6, 10:5) | details | 24.10.2023 |
Germany: Hamburg - Doubles - Main |
| Semi-finals | Istomin D./Karlovskiy E. | Novak D./Santillan A. | WO. | details | 20.10.2023 |
| Quarter-finals | Habib H./Somani P. | Istomin D./Karlovskiy E. | 0:2 (4:6, 66:7) | details | 19.10.2023 |
| 1/8-finals | Istomin D./Karlovskiy E. | Harris B./Stevenson K. | 2:0 (7:64, 6:3) | details | 18.10.2023 |
Sweden: M25 Falun - Doubles - Main |
| Quarter-finals | Istomin D./Karlovskiy E. | Matusevich A./Wendelken H. | 0:2 (64:7, 63:7) | details | 27.09.2023 |
| 1/8-finals | Istomin D./Karlovskiy E. | Barrett H./Renard L. | 2:0 (7:5, 6:1) | details | 26.09.2023 |
Kazakhstan: M25 Astana - Doubles - Main |
| Quarter-finals | Ibragimov D./Philippov E. | Istomin D./Karlovskiy E. | WO. | details | 03.08.2023 |
| 1/8-finals | Lomakin A./Shalkhimbayev D. | Istomin D./Karlovskiy E. | 0:2 (0:6, 1:6) | details | 01.08.2023 |
Kazakhstan: Astana - Doubles - Main |
| Quarter-finals | Matsui T./Uesugi K. | Istomin D./Karlovskiy E. | 2:0 (6:4, 7:65) | details | 27.07.2023 |
| 1/8-finals | Istomin D./Karlovskiy E. | Bertrand R./Kimhi O. | 2:1 (4:6, 6:1, 10:8) | details | 26.07.2023 |
Spain: Pozoblanco - Doubles - Main |
| Quarter-finals | Istomin D./Karlovskiy E. | Marrero D./Moreno De Alboran N. | 1:2 (4:6, 7:65, 10:12) | details | 20.07.2023 |
| 1/8-finals | Agabigun S./Ilkel C. | Istomin D./Karlovskiy E. | 0:2 (4:6, 2:6) | details | 19.07.2023 |
Spain: M25 Roda de Bara - Doubles - Main |
| 1/8-finals | Istomin D./Karlovskiy E. | Johns G./Winegar T. | 0:2 (4:6, 63:7) | details | 11.07.2023 |
Slovakia: M25 Poprad - Doubles - Main |
| Final | Istomin D./Karlovskiy E. | Orlov V./Paty D. | WO. | details | 24.06.2023 |
| Semi-finals | Barnat J./Duda F. | Istomin D./Karlovskiy E. | 0:2 (5:7, 4:6) | details | 23.06.2023 |
| Quarter-finals | Istomin D./Karlovskiy E. | Lanik T./Novansky M. | WO. | details | 22.06.2023 |
| 1/8-finals | Istomin D./Karlovskiy E. | Sec S./Vaise T. | 2:0 (7:68, 6:3) | details | 21.06.2023 |
Italy: Rome - Doubles - Main |
| 1/8-finals | Istomin D./Karlovskiy E. | Durasovic V./Romboli F. | 1:2 (7:64, 5:7, 2:10) | details | 26.04.2023 |
Portugal: Maia - Doubles - Main |
| 1/8-finals | Istomin D./Karlovskiy E. | Faria J./Vale D. | 0:2 (4:6, 67:7) | details | 30.11.2022 |
Italy: Andria - Doubles - Main |
| 1/8-finals | Istomin D./Karlovskiy E. | Haase R./Verbeek S. | 1:2 (3:6, 6:3, 7:10) | details | 23.11.2022 |
Italy: Ortisei - Doubles - Main |
| Final | Bortolotti M./Martos Gornes S. | Istomin D./Karlovskiy E. | 0:2 (3:6, 5:7) | details | 29.10.2022 |
| Semi-finals | Istomin D./Karlovskiy E. | Nouza P./Paulson A. | 2:1 (6:3, 62:7, 11:9) | details | 28.10.2022 |
| Quarter-finals | Istomin D./Karlovskiy E. | Jebavy R./Pavlasek A. | 2:1 (4:6, 7:5, 10:4) | details | 27.10.2022 |
Kazakhstan: Nur-Sultan - Doubles - Main |
| 1/8-finals | Istomin D./Karlovskiy E. | Donskoy E./Kachmazov A. | 1:2 (3:6, 6:4, 8:10) | details | 20.07.2022 |
France: Quimper 2 - Doubles - Main |
| 1/8-finals | Istomin D./Karlovskiy E. | Drzewiecki K./Walkow S. | 0:2 (68:7, 5:7) | details | 03.02.2021 |
USA: Winnetka - Doubles - Main |
| Semi-finals | Istomin D./Karlovskiy E. | Eubanks C./Kwiatkowski T. S. | WO. | details | 13.07.2019 |
| Quarter-finals | Fratangelo B./Krueger M. | Istomin D./Karlovskiy E. | WO. | details | 11.07.2019 |
| 1/8-finals | Istomin D./Karlovskiy E. | Maytin R./Withrow J. | 2:1 (6:1, 4:6, 10:2) | details | 09.07.2019 |