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| 1/16-finals | Ozaki R. | Sakatsume H. | 0:2 (4:6, 0:6) | detalhes | 04.03.2020 | ||
| 1/8-finals | Ozaki R. | Uchijima M. | 0:2 (4:6, 2:6) | detalhes | 09.01.2020 | ||
| 1/16-finals | Ozaki R. | Ng K. Y. | 2:0 (6:2, 6:2) | detalhes | 08.01.2020 | ||
| 1/16-finals | Ozaki R. | Rakhimova K. | 0:2 (1:6, 3:6) | detalhes | 13.11.2019 | ||
| 1/8-finals | Ozaki R. | Elie J. | 0:2 (2:6, 2:6) | detalhes | 31.10.2019 | ||
| 1/16-finals | Ozaki R. | Smith A. | 2:1 (6:2, 3:6, 6:3) | detalhes | 30.10.2019 | ||
| 1/8-finals | Inglis M. | Ozaki R. | 2:0 (6:2, 7:65) | detalhes | 24.10.2019 | ||
| 1/16-finals | Bains N. | Ozaki R. | 0:2 (64:7, 4:6) | detalhes | 22.10.2019 | ||
| 1/16-finals | Ozaki R. | Muramatsu C. | 0:2 (2:6, 4:6) | detalhes | 25.09.2019 | ||
| Semi-finals | Ozaki R. | Han X.Y. | 0:2 (2:6, 3:6) | detalhes | 14.09.2019 | ||
| 1/16-finals | Hsieh S-W. | Ozaki R. | 2:1 (6:1, 3:6, 6:3) | detalhes | 10.09.2019 | ||
| 1/16-finals | Ozaki R. | McPhee K. | 1:2 (6:4, 1:6, 5:7) | detalhes | 28.08.2019 | ||
| 1/16-finals | Ozaki R. | Tanaka Y. | 1:1 RET. (6:2, 4:6, 1:2) | detalhes | 23.07.2019 | ||
| 1/8-finals | Ozaki R. | Day K. | 0:2 (5:7, 3:6) | detalhes | 12.07.2019 | ||
| 1/16-finals | Ozaki R. | Chen K. | 2:0 (7:5, 6:4) | detalhes | 10.07.2019 | ||
| 1/16-finals | Ozaki R. | Imanishi M. | 0:2 (3:6, 1:6) | detalhes | 14.05.2019 | ||
| Quarter-finals | Diyas Z. | Ozaki R. | 2:0 (6:2, 6:0) | detalhes | 10.05.2019 | ||
| 1/8-finals | Cengiz B. | Ozaki R. | 0:2 (3:6, 3:6) | detalhes | 09.05.2019 | ||
| 1/16-finals | Ozaki R. | Loeb J. | 2:1 (6:1, 67:7, 6:2) | detalhes | 07.05.2019 | ||
| Quarter-finals | Ozaki R. | Inglis M. | 1:2 (7:61, 2:6, 2:6) | detalhes | 03.05.2019 | ||
| 1/8-finals | Lao D. | Ozaki R. | 0:2 (2:6, 3:6) | detalhes | 02.05.2019 | ||
| 1/16-finals | Ahn K. | Ozaki R. | 0:2 (2:6, 3:6) | detalhes | 30.04.2019 | ||
| 1/16-finals | In-Albon Y. | Ozaki R. | 2:0 (6:1, 6:4) | detalhes | 19.02.2019 | ||
| Quarter-finals | Ozaki R. | Sharma A. | 1:2 (4:6, 6:3, 0:6) | detalhes | 02.11.2018 | ||
| 1/8-finals | Rodionova Ar. | Ozaki R. | 1:2 (6:4, 63:7, 3:6) | detalhes | 01.11.2018 | ||
| 1/16-finals | Ozaki R. | Parnaby A. | 2:0 (6:3, 6:3) | detalhes | 30.10.2018 | ||
| 1/16-finals | Ozaki R. | Aiava D. | 0:2 (4:6, 61:7) | detalhes | 23.10.2018 | ||
| 1/16-finals | Birrell K. | Ozaki R. | 2:0 (6:4, 6:1) | detalhes | 26.09.2018 | ||
| Final | Diyas Z. | Ozaki R. | 2:0 (6:1, 6:0) | detalhes | 16.09.2018 | ||
| Semi-finals | Ozaki R. | Zaja A. | 2:0 (6:2, 7:62) | detalhes | 15.09.2018 | ||
| Quarter-finals | Ozaki R. | Muramatsu C. | 1:2 (4:6, 6:3, 3:6) | detalhes | 09.09.2018 | ||
| 1/16-finals | Potapova A. | Ozaki R. | 2:1 (2:6, 6:4, 6:0) | detalhes | 08.08.2018 | ||
| 1/8-finals | Ozaki R. | Townsend T. | 0:2 (0:6, 3:6) | detalhes | 03.05.2018 | ||
| 1/16-finals | Ozaki R. | Chirico L. | 2:0 (6:4, 6:2) | detalhes | 01.05.2018 | ||
| 1/8-finals | Townsend T. | Ozaki R. | 2:0 (6:0, 6:3) | detalhes | 26.04.2018 | ||
| 1/16-finals | Cristian J. | Ozaki R. | 0:2 (5:7, 65:7) | detalhes | 26.04.2018 | ||
| 1/8-finals | Karatantcheva S. | Ozaki R. | 2:0 (6:3, 6:2) | detalhes | 19.04.2018 | ||
| 1/16-finals | Ianchuk O. | Ozaki R. | 1:2 (66:7, 6:0, 63:7) | detalhes | 17.04.2018 | ||
| 1/16-finals | Ozaki R. | Townsend T. | 0:2 (2:6, 1:6) | detalhes | 11.04.2018 | ||
| 1/16-finals | Ozaki R. | Rybarikova M. | 0:2 (4:6, 3:6) | detalhes | 03.04.2018 | ||
| 1/16-finals | Fourlis J. | Ozaki R. | 2:0 (6:2, 6:1) | detalhes | 21.03.2018 | ||
| 1/16-finals | Hruncakova V. | Ozaki R. | 2:0 (6:4, 6:2) | detalhes | 13.03.2018 | ||
| Semi-finals | Hsieh S-W. | Ozaki R. | 2:0 (6:4, 6:3) | detalhes | 05.03.2018 | ||
| Semi-finals | Niculescu M. | Ozaki R. | 2:0 (6:1, 6:0) | detalhes | 10.02.2018 | ||
| 1/16-finals | Wang Y. | Ozaki R. | 2:0 (6:2, 6:4) | detalhes | 30.01.2018 | ||
| Quarter-finals | Ozaki R. | Imanishi M. | 1:2 (7:5, 66:7, 1:6) | detalhes | 11.01.2018 | ||
| Semi-finals | Rus A. | Ozaki R. | 2:1 (6:3, 2:6, 6:1) | detalhes | 30.12.2017 | ||
| Quarter-finals | Muhammad A. | Ozaki R. | 0:2 (3:6, 4:6) | detalhes | 29.12.2017 | ||
| 1/16-finals | Diatchenko V. | Ozaki R. | 2:0 (6:1, 6:0) | detalhes | 22.11.2017 | ||
| 1/8-finals | Nara K./Ozaki R. | Bencic B./Pavlyuchenkova A. | 0:2 (1:6, 4:6) | detalhes | 19.09.2018 | ||