 USA: Indian Wells - Singles - Qualification |
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| Semi-finals | Johnson S. | Nava E. | 1:2 (7:66, 610:7, 4:6) | dettagli | 05.03.2024 |
 Mexico: Los Cabos - Singles - Qualification |
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| Semi-finals | Kovacevic A. | Johnson S. | 2:0 (7:5, 6:3) | dettagli | 18.02.2024 |
| USA: Dallas - Singles - Main |
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| 1/16-finals | Johnson S. | Eubanks C. | 0:2 (1:6, 4:6) | dettagli | 06.02.2024 |
| USA: Dallas - Singles - Qualification |
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| Final | Atmane T. | Johnson S. | 1:2 (3:6, 7:64, 4:6) | dettagli | 05.02.2024 |
| Semi-finals | Stodder T. | Johnson S. | 0:2 (4:6, 2:6) | dettagli | 04.02.2024 |
| USA: Charlottesville - Singles - Main |
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| 1/16-finals | Mmoh M. | Johnson S. | 2:0 (7:66, 7:5) | dettagli | 01.11.2023 |
| USA: Fairfield - Singles - Main |
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| Semi-finals | Basavareddy N. | Johnson S. | 2:1 (3:6, 7:5, 6:3) | dettagli | 14.10.2023 |
| Quarter-finals | Johnson S. | Harrison C. | 2:0 (6:1, 6:2) | dettagli | 13.10.2023 |
| 1/8-finals | Schoolkate T. | Johnson S. | 0:2 (64:7, 3:6) | dettagli | 12.10.2023 |
| 1/16-finals | Tomic B. | Johnson S. | 1:2 (3:6, 6:1, 1:6) | dettagli | 11.10.2023 |
| USA: Tiburon - Singles - Main |
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| 1/8-finals | Johnson S. | Svajda Z. | 1:2 (6:3, 3:6, 4:6) | dettagli | 05.10.2023 |
| 1/16-finals | Dostanic S. | Johnson S. | 1:2 (63:7, 6:3, 2:6) | dettagli | 03.10.2023 |
| USA: US Open - Singles - Main |
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| 1/64-finals | Johnson S. | Fritz T. | 0:3 (2:6, 1:6, 2:6) | dettagli | 28.08.2023 |
| USA: Stanford - Singles - Main |
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| 1/16-finals | Johnson S. | Watanuki Y. | 1:2 (5:7, 7:5, 4:6) | dettagli | 15.08.2023 |
| USA: Cary - Singles - Main |
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| 1/16-finals | Johnson S. | Svajda Z. | CAN. | dettagli | 08.08.2023 |
| USA: Lexington - Singles - Main |
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| Final | Cazaux A. | Johnson S. | 0:2 (65:7, 4:6) | dettagli | 06.08.2023 |
| Semi-finals | Sandgren T. | Johnson S. | 0:2 (61:7, 3:6) | dettagli | 05.08.2023 |
| Quarter-finals | Blanch U. | Johnson S. | 0:2 (3:6, 4:6) | dettagli | 04.08.2023 |
| 1/8-finals | Spizzirri E. | Johnson S. | 0:2 (3:6, 5:7) | dettagli | 02.08.2023 |
| 1/16-finals | Harris B. | Johnson S. | 0:2 (65:7, 4:6) | dettagli | 01.08.2023 |
| USA: Newport - Singles - Main |
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| 1/8-finals | Johnson S. | Humbert U. | 0:2 (4:6, 4:6) | dettagli | 19.07.2023 |
| 1/16-finals | Chung Y. | Johnson S. | 0:2 (2:6, 3:6) | dettagli | 19.07.2023 |
| USA: Chicago - Singles - Main |
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| 1/16-finals | Basavareddy N. | Johnson S. | 2:1 (6:3, 2:6, 6:4) | dettagli | 12.07.2023 |
| USA: Bloomfield Hills - Singles - Main |
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| Final | Kukushkin M. | Johnson S. | 1:2 (4:6, 7:67, 64:7) | dettagli | 09.07.2023 |
| Semi-finals | Schoolkate T. | Johnson S. | 0:2 (4:6, 2:6) | dettagli | 08.07.2023 |
| Quarter-finals | Johnson S. | Uchiyama Y. | 2:1 (6:4, 60:7, 7:64) | dettagli | 07.07.2023 |
| 1/8-finals | Johnson S. | McCabe J. | 2:0 (6:4, 6:2) | dettagli | 06.07.2023 |
| 1/16-finals | Johnson S. | McHugh A. | 2:0 (7:67, 6:4) | dettagli | 05.07.2023 |
 United Kingdom: Wimbledon - Singles - Qualification |
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| Quarter-finals | Stricker D. | Johnson S. | 2:0 (7:5, 6:4) | dettagli | 26.06.2023 |
| United Kingdom: Nottingham - Singles - Main |
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| 1/16-finals | Johnson S. | Fery A. | 1:2 (6:4, 3:6, 3:6) | dettagli | 13.06.2023 |
 France: French Open - Singles - Qualification |
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| Quarter-finals | Johnson S. | Bergs Z. | 0:2 (4:6, 4:6) | dettagli | 22.05.2023 |
 Portugal: Oeiras 4 - Singles - Main |
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| 1/8-finals | Moreno De Alboran N. | Johnson S. | 2:0 (6:3, 6:0) | dettagli | 17.05.2023 |
| 1/16-finals | Johnson S. | Hijikata R. | 2:1 (1:6, 7:63, 6:1) | dettagli | 16.05.2023 |
| USA: Houston - Singles - Main |
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| 1/8-finals | Tiafoe F. | Johnson S. | 2:0 (6:2, 6:4) | dettagli | 08.04.2023 |
| 1/16-finals | Johnson S. | Bagnis F. | 2:1 (7:65, 1:6, 6:1) | dettagli | 04.04.2023 |
| USA: Miami - Singles - Qualification |
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| Semi-finals | Borges N. | Johnson S. | 2:0 (6:4, 6:4) | dettagli | 20.03.2023 |
| USA: Indian Wells - Singles - Qualification |
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| Semi-finals | Svajda Z. | Johnson S. | 2:1 (4:6, 6:4, 7:64) | dettagli | 07.03.2023 |
| Mexico: Acapulco - Singles - Qualification |
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| Semi-finals | Johnson S. | Chappell N. | 1:2 (6:4, 1:6, 2:6) | dettagli | 26.02.2023 |
| Mexico: Monterrey - Singles - Main |
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| 1/16-finals | Johnson S. | Daniel T. | 1:2 (4:6, 6:3, 3:6) | dettagli | 21.02.2023 |
| USA: Delray Beach - Singles - Main |
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| 1/16-finals | Johnson S. | Borges N. | 1:2 (4:6, 6:3, 4:6) | dettagli | 13.02.2023 |
| USA: Delray Beach - Singles - Qualification |
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| Final | Borges N. | Johnson S. | 2:0 (6:2, 6:2) | dettagli | 12.02.2023 |
| Semi-finals | Casanova H. | Johnson S. | 1:2 (3:6, 7:5, 64:7) | dettagli | 12.02.2023 |
| USA: Dallas - Singles - Main |
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| 1/16-finals | Johnson S. | Mannarino A. | 0:2 (66:7, 2:6) | dettagli | 07.02.2023 |
| USA: Cleveland - Singles - Main |
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| Quarter-finals | Johnson S. | Kovacevic A. | 1:2 (7:65, 5:7, 4:6) | dettagli | 04.02.2023 |
| 1/8-finals | Johnson S. | Seelig K. | 2:0 (7:69, 6:2) | dettagli | 01.02.2023 |
| 1/16-finals | Johnson S. | Forejtek J. | 2:0 (6:4, 7:62) | dettagli | 01.02.2023 |
| USA: Champaign - Singles - Main |
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| Quarter-finals | Kovacevic A. | Johnson S. | 2:0 (6:3, 6:4) | dettagli | 18.11.2022 |
| 1/8-finals | Gerch L. | Johnson S. | 1:2 (6:4, 3:6, 4:6) | dettagli | 17.11.2022 |