 USA: Indian Wells - Singles - Qualification |
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| Semi-finals | Kokkinakis T. | Sugita Y. | 2:0 (7:65, 6:3) | details | 07.03.2023 |
 Mexico: Acapulco - Singles - Qualification |
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| Semi-finals | Sugita Y. | Darderi L. | 0:2 (5:7, 0:6) | details | 26.02.2023 |
 Australia: Australian Open - Singles - Qualification |
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| Semi-finals | Sugita Y. | Nava E. | 1:2 (3:6, 6:3, 3:6) | details | 11.01.2023 |
| Quarter-finals | Gombos N. | Sugita Y. | 0:2 (4:6, 1:6) | details | 10.01.2023 |
 Japan: Yokkaichi - Singles - Main |
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| 1/8-finals | Sugita Y. | Sinclair C. | 0:2 (4:6, 3:6) | details | 24.11.2022 |
| 1/16-finals | Noguchi R. | Sugita Y. | 1:2 (4:6, 6:1, 1:6) | details | 21.11.2022 |
| Japan: Kobe - Singles - Main |
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| 1/16-finals | Sugita Y. | Zhukayev B. | 1:2 (6:4, 4:6, 4:6) | details | 15.11.2022 |
| Japan: Matsuyama - Singles - Main |
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| 1/16-finals | Sugita Y. | Ly Nam H. | 1:2 (7:65, 3:6, 4:6) | details | 07.11.2022 |
| Japan: Yokohama - Singles - Main |
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| 1/16-finals | Sugita Y. | Wu Tung-Lin | 0:2 (3:6, 3:6) | details | 31.10.2022 |
 United Kingdom: Wimbledon - Singles - Qualification |
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| Quarter-finals | Gaio F. | Sugita Y. | 2:0 (6:4, 6:2) | details | 20.06.2022 |
 Germany: Halle - Singles - Qualification |
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| Semi-finals | Sugita Y. | O'Connell C. | 0:2 (1:6, 1:6) | details | 11.06.2022 |
 Netherlands: Hertogenbosch - Singles - Qualification |
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| Semi-finals | Sugita Y. | Brouwer G. | 0:2 (4:6, 2:6) | details | 04.06.2022 |
| United Kingdom: Surbiton - Singles - Main |
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| 1/16-finals | Sugita Y. | Ramanathan R. | 1:2 (6:4, 5:7, 62:7) | details | 01.06.2022 |
 France: French Open - Singles - Qualification |
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| Quarter-finals | Sugita Y. | Ugo Carabelli C. | 0:2 (4:6, 4:6) | details | 17.05.2022 |
| Mexico: Morelos - Singles - Main |
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| 1/16-finals | Hernandez A. | Sugita Y. | 1:0 RET. (6:3, 3:1) | details | 25.04.2022 |
| Mexico: Aguascalientes - Singles - Main |
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| 1/16-finals | Sugita Y. | Clarke J. | 1:2 (7:5, 5:7, 0:6) | details | 18.04.2022 |
 Switzerland: Lugano - Singles - Main |
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| 1/8-finals | Rodionov J. | Sugita Y. | 2:0 (6:3, 6:0) | details | 31.03.2022 |
| 1/16-finals | Chung Y. | Sugita Y. | 0:2 (3:6, 4:6) | details | 29.03.2022 |
| Switzerland: Biel - Singles - Main |
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| 1/16-finals | Sugita Y. | Stricker D. | 0:2 (65:7, 1:6) | details | 23.03.2022 |
| USA: US Open - Singles - Main |
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| 1/64-finals | Ruud C. | Sugita Y. | 3:0 (6:3, 6:2, 6:2) | details | 30.08.2021 |
| USA: US Open - Singles - Qualification |
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| Final | Sugita Y. | Karlovic I. | 0:2 (3:6, 65:7) | details | 27.08.2021 |
| Semi-finals | Sugita Y. | Kokkinakis T. | 2:1 (7:64, 4:6, 7:64) | details | 27.08.2021 |
| Quarter-finals | Sugita Y. | Vilella M. M. | 2:1 (3:6, 6:3, 6:2) | details | 25.08.2021 |
 World: Olympic Games - Singles - Main |
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| 1/32-finals | Fognini F. | Sugita Y. | 2:0 (6:4, 6:3) | details | 24.07.2021 |
| USA: Newport - Singles - Main |
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| 1/8-finals | Thompson J. | Sugita Y. | 2:0 (6:0, 6:2) | details | 14.07.2021 |
| 1/16-finals | Sugita Y. | Rodionov J. | 2:0 (7:5, 6:3) | details | 12.07.2021 |
| United Kingdom: Wimbledon - Singles - Main |
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| 1/64-finals | Gasquet R. | Sugita Y. | 3:1 (7:64, 4:6, 6:2, 6:1) | details | 29.06.2021 |
| United Kingdom: Nottingham 2 - Singles - Main |
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| 1/16-finals | Sugita Y. | Majchrzak K. | 0:2 (0:6, 3:6) | details | 15.06.2021 |
 Czech Republic: Prague - Singles - Main |
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| 1/16-finals | Tabilo A. | Sugita Y. | 1:0 RET. (7:5, 4:0) | details | 03.05.2021 |
| Germany: Munich - Singles - Qualification |
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| Semi-finals | Sugita Y. | Stebe C. | 0:2 (4:6, 3:6) | details | 24.04.2021 |
 Serbia: Belgrade - Singles - Qualification |
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| Semi-finals | Rinderknech A. | Sugita Y. | 2:0 (6:1, 6:2) | details | 18.04.2021 |
| Switzerland: Lugano - Singles - Main |
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| Semi-finals | Sugita Y. | Stricker D. | 1:2 (7:5, 4:6, 4:6) | details | 27.03.2021 |
| Quarter-finals | Sugita Y. | Karlovskiy E. | 2:1 (7:64, 4:6, 7:62) | details | 26.03.2021 |
| 1/8-finals | Sugita Y. | Riedi L. | 2:1 (7:66, 61:7, 6:4) | details | 24.03.2021 |
 Italy: Biella 4 - Singles - Main |
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| 1/16-finals | Sugita Y. | Masur D. | 1:2 (64:7, 7:63, 3:6) | details | 16.03.2021 |
| Italy: Biella 3 - Singles - Main |
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| 1/16-finals | Sugita Y. | Nardi L. | 0:2 (2:6, 2:6) | details | 09.03.2021 |
| Australia: Australian Open - Singles - Main |
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| 1/64-finals | Sugita Y. | Tomic B. | 1:1 RET. (6:3, 1:6, 1:4) | details | 08.02.2021 |
| Australia: Melbourne (Murray River Open) - Singles - Main |
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| 1/16-finals | Sugita Y. | Auger-Aliassime F. | 0:2 (3:6, 1:6) | details | 03.02.2021 |
| 1/32-finals | Sugita Y. | Halys Q. | 2:1 (3:6, 7:63, 7:5) | details | 02.02.2021 |
 Bulgaria: Sofia - Singles - Main |
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| 1/16-finals | Albot R. | Sugita Y. | 2:0 (6:4, 6:1) | details | 08.11.2020 |
| Bulgaria: Sofia - Singles - Qualification |
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| Semi-finals | Sugita Y. | Donev G. | CAN. | details | 07.11.2020 |
 Kazakhstan: Nur-Sultan - Singles - Main |
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| 1/8-finals | Mannarino A. | Sugita Y. | 2:0 (6:1, 6:1) | details | 29.10.2020 |
| 1/16-finals | Dzumhur D. | Sugita Y. | 1:2 (1:6, 7:5, 4:6) | details | 27.10.2020 |
| Kazakhstan: Nur-Sultan - Singles - Qualification |
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| Final | Sugita Y. | Polmans M. | 2:1 (3:6, 6:2, 7:65) | details | 26.10.2020 |
| Semi-finals | Sugita Y. | Safwat M. | 2:0 (6:0, 6:2) | details | 25.10.2020 |
 Belgium: Antwerp - Singles - Qualification |
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| Final | Caruso S. | Sugita Y. | 2:0 (6:3, 6:4) | details | 19.10.2020 |
| Semi-finals | Ionel N. D. | Sugita Y. | 1:2 (6:4, 1:6, 2:6) | details | 18.10.2020 |
| Germany: Cologne - Singles - Qualification |
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| Semi-finals | Sugita Y. | Laaksonen H. | 0:2 (1:6, 4:6) | details | 10.10.2020 |