 Spain: Madrid - Singles - Main |
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| 1/64-finals | Michelsen A. | Fonseca J. | 1:2 (6:4, 0:6, 2:6) | details | 25.04.2024 |
 Germany: Munich - Singles - Main |
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| 1/8-finals | Michelsen A. | Garin C. | 1:2 (7:67, 2:6, 1:6) | details | 18.04.2024 |
| 1/16-finals | Rehberg M. H. | Michelsen A. | 0:2 (62:7, 3:6) | details | 15.04.2024 |
 Monaco: Monte Carlo - Singles - Qualification |
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| Semi-finals | Moutet C. | Michelsen A. | 2:0 (6:1, 6:3) | details | 06.04.2024 |
 USA: Houston - Singles - Main |
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| 1/16-finals | Michelsen A. | Purcell M. | 1:2 (5:7, 7:64, 4:6) | details | 02.04.2024 |
| USA: Miami - Singles - Main |
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| 1/32-finals | Griekspoor T. | Michelsen A. | 2:1 (7:65, 67:7, 6:4) | details | 23.03.2024 |
| 1/64-finals | Michelsen A. | Klein L. | 2:0 (7:65, 6:2) | details | 21.03.2024 |
| USA: Indian Wells - Singles - Main |
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| 1/32-finals | Paul T. | Michelsen A. | 2:0 (6:2, 6:2) | details | 10.03.2024 |
| 1/64-finals | Michelsen A. | Munar J. | 2:0 (6:2, 6:3) | details | 08.03.2024 |
 Mexico: Los Cabos - Singles - Main |
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| Quarter-finals | Michelsen A. | Thompson J. | 1:2 (6:0, 61:7, 5:7) | details | 23.02.2024 |
| 1/8-finals | De Minaur A. | Michelsen A. | 0:2 (4:6, 1:6) | details | 22.02.2024 |
| 1/16-finals | Lestienne C. | Michelsen A. | 0:2 (3:6, 63:7) | details | 20.02.2024 |
| USA: Delray Beach - Singles - Main |
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| 1/8-finals | Michelsen A. | Paul T. | 1:2 (7:5, 4:6, 64:7) | details | 15.02.2024 |
| 1/16-finals | Michelsen A. | Kokkinakis T. | 2:0 (6:1, 6:2) | details | 14.02.2024 |
| USA: Dallas - Singles - Main |
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| 1/8-finals | Tiafoe F. | Michelsen A. | 2:0 (6:4, 6:3) | details | 09.02.2024 |
| 1/16-finals | Sandgren T. | Michelsen A. | 1:2 (3:6, 6:3, 1:6) | details | 06.02.2024 |
 Australia: Australian Open - Singles - Main |
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| 1/16-finals | Zverev A. | Michelsen A. | 3:0 (6:2, 7:64, 6:2) | details | 20.01.2024 |
| 1/32-finals | Michelsen A. | Lehecka J. | 3:1 (4:6, 6:3, 6:4, 6:4) | details | 18.01.2024 |
| 1/64-finals | McCabe J. | Michelsen A. | 1:3 (65:7, 6:3, 1:6, 2:6) | details | 16.01.2024 |
 New Zealand: Auckland - Singles - Main |
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| 1/16-finals | Michelsen A. | Borges N. | 1:2 (6:0, 66:7, 3:6) | details | 08.01.2024 |
| New Zealand: Auckland - Singles - Qualification |
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| Final | Loutit J. | Michelsen A. | 0:2 (3:6, 3:6) | details | 07.01.2024 |
| Semi-finals | Michelsen A. | Barrere G. | 2:0 (6:2, 6:2) | details | 06.01.2024 |
| Australia: Brisbane - Singles - Main |
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| 1/16-finals | Michelsen A. | Humbert U. | 0:2 (4:6, 4:6) | details | 03.01.2024 |
| Australia: Brisbane - Singles - Qualification |
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| Final | Michelsen A. | Schwartzman D. | 2:0 (6:1, 6:4) | details | 31.12.2023 |
| Semi-finals | Michelsen A. | Giannessi A. | 2:0 (6:3, 6:2) | details | 30.12.2023 |
 World: Next Gen Finals - Jeddah - Main |
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| Group B | van Assche L. | Michelsen A. | 3:2 (4:30, 34:4, 34:4, 4:1, 4:36) | details | 30.11.2023 |
| Group B | Michelsen A. | Shelbayh A. | 1:3 (2:4, 4:1, 0:4, 0:4) | details | 29.11.2023 |
| Group B | Michelsen A. | Medjedovic H. | 2:3 (2:4, 33:4, 4:33, 4:35, 34:4) | details | 28.11.2023 |
| USA: Champaign - Singles - Main |
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| Final | Kypson P. | Michelsen A. | 2:0 (6:4, 6:3) | details | 19.11.2023 |
| Semi-finals | Droguet T. | Michelsen A. | 1:2 (6:2, 4:6, 3:6) | details | 18.11.2023 |
| Quarter-finals | Damm M. | Michelsen A. | 1:2 (1:6, 6:1, 4:6) | details | 17.11.2023 |
| 1/8-finals | Fanselow S. | Michelsen A. | 0:2 (3:6, 2:6) | details | 16.11.2023 |
| 1/16-finals | Tomic B. | Michelsen A. | 0:2 (4:6, 0:6) | details | 15.11.2023 |
| USA: Knoxville - Singles - Main |
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| Final | Kudla D. | Michelsen A. | 1:2 (5:7, 6:4, 2:6) | details | 12.11.2023 |
| Semi-finals | Michelsen A. | Sandgren T. | 2:1 (6:2, 2:6, 6:4) | details | 11.11.2023 |
| Quarter-finals | Basavareddy N. | Michelsen A. | 0:2 (3:6, 3:6) | details | 10.11.2023 |
| 1/8-finals | Debru G. | Michelsen A. | 1:2 (3:6, 6:3, 4:6) | details | 08.11.2023 |
| 1/16-finals | Tomic B. | Michelsen A. | 1:2 (6:4, 65:7, 4:6) | details | 07.11.2023 |
| USA: Charlottesville - Singles - Main |
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| 1/16-finals | Kingsley C. | Michelsen A. | 2:0 (7:5, 6:3) | details | 31.10.2023 |
| USA: Fairfield - Singles - Main |
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| Quarter-finals | Michelsen A. | Basavareddy N. | 0:2 (3:6, 3:6) | details | 13.10.2023 |
| 1/8-finals | Michelsen A. | Kwiatkowski T. S. | 2:0 (6:3, 6:4) | details | 12.10.2023 |
| 1/16-finals | Michelsen A. | Dougaz A. | 2:1 (2:6, 7:65, 6:0) | details | 10.10.2023 |
| USA: Tiburon - Singles - Main |
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| 1/8-finals | Michelsen A. | Kwiatkowski T. S. | 1:2 (6:4, 4:6, 3:6) | details | 06.10.2023 |
| 1/16-finals | Michelsen A. | Schnur B. | 2:1 (62:7, 6:3, 6:4) | details | 03.10.2023 |
| USA: Cary 2 - Singles - Main |
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| Semi-finals | Svajda Z. | Michelsen A. | 2:0 (6:3, 7:5) | details | 16.09.2023 |
| Quarter-finals | Andreozzi G. | Michelsen A. | 0:2 (3:6, 5:7) | details | 15.09.2023 |
| 1/8-finals | Kirchheimer S. | Michelsen A. | 0:2 (3:6, 1:6) | details | 14.09.2023 |
| 1/16-finals | Janvier M. | Michelsen A. | 1:2 (7:5, 67:7, 3:6) | details | 12.09.2023 |