 New Zealand: Auckland - Doubles - Main |
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| 1/8-finals | Sitak A./Statham J. R. | Arneodo R./Weissborn S. | 1:2 (5:7, 6:3, 8:10) | details | 09.01.2024 |
 Japan: Yokkaichi - Doubles - Main |
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| 1/8-finals | Sinclair C./Sitak A. | Hsu Y. H./Shimizu Y. | 1:2 (6:1, 1:6, 5:10) | details | 29.11.2023 |
| Japan: Yokohama - Doubles - Main |
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| 1/8-finals | King E./Stalder R. | Sinclair C./Sitak A. | 2:0 (6:2, 6:2) | details | 22.11.2023 |
 Canada: Calgary - Doubles - Main |
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| 1/8-finals | Diez S./Sousa J. | Paire B./Sitak A. | 2:0 (6:4, 7:66) | details | 08.11.2023 |
 USA: Charlottesville - Doubles - Main |
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| 1/8-finals | Krueger M./Ritschard A. | Paire B./Sitak A. | 2:1 (7:5, 4:6, 10:5) | details | 31.10.2023 |
| USA: Fairfield - Doubles - Main |
|---|
| 1/8-finals | Hach Verdugo H./Sitak A. | Gomez F. A./Stevenson K. | 0:2 (4:6, 4:6) | details | 11.10.2023 |
| USA: Tiburon - Doubles - Main |
|---|
| 1/8-finals | Goldhoff G./Perez A. | Hach Verdugo H./Sitak A. | 2:0 (7:5, 7:65) | details | 04.10.2023 |
| USA: Charleston - Doubles - Main |
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| 1/8-finals | Hach Verdugo H./Sitak A. | Kudla D./Zink T. | 0:2 (3:6, 4:6) | details | 27.09.2023 |
 World: Davis Cup - World Group II - Doubles - Main |
|---|
| | Reynolds F./Sitak A. | Isaro P./Trongcharoenchaikul W. | 2:0 (6:4, 6:2) | details | 16.09.2023 |
 France: Cassis - Doubles - Main |
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| 1/8-finals | Duncan S./Willis M. | Reynolds F./Sitak A. | 2:0 (6:1, 7:62) | details | 06.09.2023 |
 Spain: Mallorca - Doubles - Main |
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| Semi-finals | Arends S./Sitak A. | Cukierman D./Paris J. | 0:2 (3:6, 2:6) | details | 01.09.2023 |
| Quarter-finals | Kaliyanda Poonacha N./Sharan D. | Arends S./Sitak A. | 0:2 (2:6, 4:6) | details | 31.08.2023 |
| 1/8-finals | Landaluce M./Wong C. | Arends S./Sitak A. | 0:2 (4:6, 5:7) | details | 29.08.2023 |
 Czech Republic: Prague 3 - Doubles - Main |
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| 1/8-finals | Reynolds F./Sitak A. | Babic Z./Donski A. | 1:2 (68:7, 7:62, 3:10) | details | 23.08.2023 |
| USA: Stanford - Doubles - Main |
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| Semi-finals | Hidalgo D./Rodriguez C. | Hach Verdugo H./Sitak A. | 2:0 (6:3, 6:3) | details | 18.08.2023 |
| Quarter-finals | Hach Verdugo H./Sitak A. | Libietis M./McLachlan B. | 2:1 (6:4, 67:7, 10:7) | details | 17.08.2023 |
| 1/8-finals | Pervolarakis M./Walton A. | Hach Verdugo H./Sitak A. | 1:2 (7:5, 4:6, 6:10) | details | 16.08.2023 |
| USA: Cary - Doubles - Main |
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| 1/8-finals | Libietis M./Walton A. | Reese H./Sitak A. | 2:0 (6:4, 6:4) | details | 10.08.2023 |
| USA: Lexington - Doubles - Main |
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| 1/8-finals | Reese H./Sitak A. | Harris B./Stevenson K. | 0:2 (4:6, 5:7) | details | 02.08.2023 |
| Canada: Granby - Doubles - Main |
|---|
| 1/8-finals | McCabe J./Rai A. | Reese H./Sitak A. | 2:1 (6:4, 2:6, 10:8) | details | 19.07.2023 |
| USA: Chicago - Doubles - Main |
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| Quarter-finals | Nam Ji S./Sitak A. | Harrison C./Sandgren T. | 0:2 (2:6, 1:6) | details | 13.07.2023 |
| 1/8-finals | Nam Ji S./Sitak A. | Puttergill C./Sinclair C. | 2:0 (6:3, 6:2) | details | 12.07.2023 |
| USA: Bloomfield Hills - Doubles - Main |
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| Quarter-finals | Nam Ji S./Sitak A. | Harrison C./McHugh A. | 0:2 (63:7, 66:7) | details | 06.07.2023 |
| 1/8-finals | Nam Ji S./Sitak A. | DeMuth O./Martin A. | 2:1 (65:7, 6:1, 13:11) | details | 06.07.2023 |
 Colombia: Cali - Doubles - Main |
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| Semi-finals | Andreozzi G./Rodriguez C. | Nam Ji S./Sitak A. | 2:0 (6:3, 6:3) | details | 24.06.2023 |
| Quarter-finals | Nam Ji S./Sitak A. | Heide G./Reis Da Silva J. | 2:0 (6:2, 6:4) | details | 22.06.2023 |
| 1/8-finals | Nam Ji S./Sitak A. | Melzer G./Rehberg M. H. | 2:1 (1:6, 6:4, 13:11) | details | 20.06.2023 |
| 1/8-finals | Nam Ji S./Sitak A. | Rybakov A./Schoolkate T. | CAN. | details | 20.06.2023 |
 Puerto Rico: Palmas Del Mar - Doubles - Main |
|---|
| Semi-finals | Matsui T./Uesugi K. | Nam Ji S./Sitak A. | 2:0 (6:4, 7:5) | details | 16.06.2023 |
| Quarter-finals | Alves M./Heide G. | Nam Ji S./Sitak A. | 1:2 (1:6, 7:64, 8:10) | details | 15.06.2023 |
| 1/8-finals | Diez S./Galarneau A. | Nam Ji S./Sitak A. | 0:2 (4:6, 5:7) | details | 14.06.2023 |
| USA: Tyler - Doubles - Main |
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| 1/8-finals | Nam Ji S./Sitak A. | Collier R./Valiev I. | 0:2 (3:6, 4:6) | details | 08.06.2023 |
| USA: Little Rock - Doubles - Main |
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| Final | Nam Ji S./Sitak A. | Galarneau A./Moreno De Alboran N. | 2:0 (6:4, 6:4) | details | 03.06.2023 |
| Semi-finals | Nam Ji S./Sitak A. | Lawson A./Pervolarakis M. | 2:0 (7:65, 6:2) | details | 03.06.2023 |
| Quarter-finals | Mansouri S./Statham J. R. | Nam Ji S./Sitak A. | 0:2 (4:6, 61:7) | details | 01.06.2023 |
| 1/8-finals | Kadhe A./Masur D. | Nam Ji S./Sitak A. | 1:2 (6:1, 63:7, 6:10) | details | 30.05.2023 |
 Tunisia: Tunis - Doubles - Main |
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| Quarter-finals | Durasovic V./Sitak A. | McCabe J./Ouakaa A. | 0:2 (2:6, 2:6) | details | 18.05.2023 |
| 1/8-finals | Durasovic V./Sitak A. | Bolt A./Shimabukuro S. | 2:0 (7:69, 6:3) | details | 17.05.2023 |
 Austria: Mauthausen - Doubles - Main |
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| 1/8-finals | Bergevi F./Sitak A. | Balaji N. S./Nedunchezhiyan J. | 0:2 (3:6, 4:6) | details | 10.05.2023 |
| Czech Republic: Prague - Doubles - Main |
|---|
| 1/8-finals | Bergevi F./Sitak A. | Manafov V./Martos Gornes S. | 0:2 (4:6, 1:6) | details | 03.05.2023 |
 Italy: Rome - Doubles - Main |
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| 1/8-finals | Doumbia S./Reboul F. | Matuszewski P./Sitak A. | 2:0 (6:1, 6:2) | details | 26.04.2023 |
 Portugal: Oeiras 3 - Doubles - Main |
|---|
| 1/8-finals | Arends S./Tsitsipas Pe. | Prashanth V./Sitak A. | 2:1 (6:4, 3:6, 10:6) | details | 19.04.2023 |
 Croatia: Split - Doubles - Main |
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| 1/8-finals | Chandrasekar A./Prashanth V. | Sitak A./Uchida K. | 2:0 (6:2, 6:1) | details | 12.04.2023 |
| Spain: Murcia - Doubles - Main |
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| 1/8-finals | Niklas-Salminen P./Stevens B. | Durasovic V./Sitak A. | 2:1 (6:3, 67:7, 10:4) | details | 05.04.2023 |
| France: Lille - Doubles - Main |
|---|
| 1/8-finals | Geerts M./Schell N. | Cukierman D./Sitak A. | 2:0 (6:3, 6:2) | details | 28.03.2023 |
 Switzerland: Biel - Doubles - Main |
|---|
| 1/8-finals | Cukierman D./Sitak A. | Harris A./Smith J. P. | 1:2 (5:7, 7:65, 6:10) | details | 22.03.2023 |
 Chile: Santiago - Doubles - Main |
|---|
| Quarter-finals | Boscardin Dias P./Reis Da Silva J. | Martos Gornes S./Sitak A. | 2:1 (6:3, 4:6, 10:6) | details | 09.03.2023 |
| 1/8-finals | Lopez San Martin A./Villanueva G. | Martos Gornes S./Sitak A. | 1:2 (3:6, 6:3, 7:10) | details | 08.03.2023 |
| 1/8-finals | Pereira F./Soto M. | Martos Gornes S./Sitak A. | CAN. | details | 08.03.2023 |