 USA: MatchPlay 120 - Singles - Main |
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| | Osaka M. | Fernandez L. | CAN. | details | 07.06.2020 |
 World: Others matches - Singles - Main |
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| | Osaka M. | Van Nguyen C. | 2:0 (6:2, 6:0) | details | 09.05.2020 |
| | Osaka M. | Wijesundera R. | 2:1 (6:1, 4:6, 10:6) | details | 09.05.2020 |
| | Osaka M. | Jovic J. | 2:0 (6:4, 6:1) | details | 07.05.2020 |
| | Stewart K. | Osaka M. | 2:0 (6:1, 6:4) | details | 07.05.2020 |
| | Osaka M. | Sewing S. | 2:0 (6:3, 6:1) | details | 07.05.2020 |
 Mexico: W25 Irapuato - Singles - Main |
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| 1/8-finals | Podoroska N. | Osaka M. | 2:0 (6:0, 6:4) | details | 12.03.2020 |
| 1/16-finals | Osaka M. | Garcia-Perez G. | 2:0 (7:5, 7:64) | details | 09.03.2020 |
| USA: W25 Rancho Santa Fe - Singles - Main |
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| 1/16-finals | Osaka M. | Sramkova R. | 0:2 (2:6, 4:6) | details | 25.02.2020 |
| USA: W25 Vero Beach - Singles - Main |
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| 1/16-finals | Osaka M. | Mendez S. | 1:2 (3:6, 7:65, 4:6) | details | 24.01.2020 |
| USA: W25 Daytona Beach - Singles - Main |
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| 1/8-finals | Osaka M. | Galfi D. | 0:2 (2:6, 0:6) | details | 16.01.2020 |
| 1/16-finals | Gleason Q. | Osaka M. | 1:2 (6:4, 3:6, 5:7) | details | 15.01.2020 |
| USA: Houston - Singles - Main |
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| 1/16-finals | McNally C. | Osaka M. | 2:0 (6:2, 6:0) | details | 14.11.2019 |
| 1/32-finals | Osaka M. | Khazaniuk D. | 2:0 (6:1, 7:5) | details | 10.11.2019 |
 Australia: Playford - Singles - Main |
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| 1/16-finals | Osaka M. | Bains N. | 0:2 (1:6, 2:6) | details | 30.10.2019 |
| Australia: Bendigo - Singles - Main |
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| 1/16-finals | Inglis M. | Osaka M. | 2:0 (7:5, 6:4) | details | 23.10.2019 |
| USA: W60 Charleston, SC - Singles - Main |
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| 1/8-finals | Mateas M. | Osaka M. | 2:0 (6:1, 7:64) | details | 03.10.2019 |
| 1/16-finals | Guo H. | Osaka M. | 0:2 (4:6, 1:6) | details | 01.10.2019 |
 Switzerland: W60 Montreux - Singles - Main |
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| Quarter-finals | Rame A. | Osaka M. | 2:0 (6:0, 6:4) | details | 06.09.2019 |
| 1/8-finals | Osaka M. | Minella M. | 2:1 (6:1, 3:6, 6:4) | details | 05.09.2019 |
| 1/16-finals | Ganz F. | Osaka M. | 0:2 (4:6, 2:6) | details | 04.09.2019 |
| USA: W100 Charleston, SC - Singles - Main |
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| 1/16-finals | Cepede V. | Osaka M. | 2:1 (1:6, 7:5, 6:3) | details | 01.05.2019 |
| USA: Palm Harbor - Singles - Main |
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| 1/8-finals | Osaka M. | Nara K. | 0:2 (65:7, 4:6) | details | 04.04.2019 |
| 1/16-finals | Osaka M. | Radwanska U. | 2:0 (6:1, 7:66) | details | 02.04.2019 |
| USA: Miami - Singles - Main |
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| 1/64-finals | Osuigwe W. | Osaka M. | 2:0 (6:2, 6:4) | details | 21.03.2019 |
| USA: Newport Beach - Singles - Main |
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| 1/32-finals | Osaka M. | Volynets K. | 0:2 (0:6, 0:6) | details | 22.01.2019 |
 Canada: Toronto - Singles - Main |
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| 1/16-finals | Andreescu B. | Osaka M. | 2:0 (6:1, 6:1) | details | 31.10.2018 |
| Canada: Saguenay - Singles - Main |
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| 1/16-finals | Arcangioli M. | Osaka M. | 0:1 RET. (1:6, 5:2) | details | 24.10.2018 |
| USA: Stockton - Singles - Main |
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| 1/8-finals | Osaka M. | Anderson R. | 0:2 (5:7, 4:6) | details | 05.10.2018 |
| 1/16-finals | Osaka M. | Sanchez M. | 2:0 (6:1, 6:3) | details | 04.10.2018 |
 Japan: Tokyo - Singles - Qualification |
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| Semi-finals | Osaka M. | Lottner A. | 1:2 (3:6, 6:4, 3:6) | details | 15.09.2018 |
| Switzerland: W60 Montreux - Singles - Main |
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| Quarter-finals | Zimmermann K. | Osaka M. | 2:0 (7:5, 6:4) | details | 07.09.2018 |
| 1/8-finals | Osaka M. | Trevisan M. | 2:0 (6:3, 6:2) | details | 06.09.2018 |
 Romania: Bucharest - Singles - Qualification |
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| Quarter-finals | Liu C. | Osaka M. | 2:1 (6:0, 3:6, 6:4) | details | 14.07.2018 |
 China: Baotou - Singles - Main |
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| 1/8-finals | Osaka M. | Kukharchuk N. | 0:2 (5:7, 0:6) | details | 24.05.2018 |
| 1/16-finals | Osaka M. | Jiang X. | 2:0 (6:0, 6:2) | details | 23.05.2018 |
| USA: Charlottesville - Singles - Main |
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| Quarter-finals | Osaka M. | Kalinina A. | 1:2 (2:6, 7:65, 5:7) | details | 27.04.2018 |
| 1/8-finals | Brengle M. | Osaka M. | 0:2 (1:6, 2:6) | details | 26.04.2018 |
| 1/16-finals | Osaka M. | Sebov K. | 2:1 (1:6, 7:67, 6:1) | details | 26.04.2018 |
| USA: Templeton - Singles - Main |
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| 1/8-finals | Vickery S. | Osaka M. | 2:1 (3:6, 6:4, 6:4) | details | 28.09.2017 |
| 1/16-finals | Lao D. | Osaka M. | 0:2 (3:6, 4:6) | details | 27.09.2017 |
| Japan: Tokyo - Singles - Qualification |
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| Semi-finals | Osaka M. | Duan Y. | 0:2 (5:7, 4:6) | details | 17.09.2017 |
| Quarter-finals | Osaka M. | Sema E. | 2:1 (0:6, 6:1, 6:4) | details | 16.09.2017 |
| Japan: Tokyo 2 - Singles - Qualification |
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| Quarter-finals | Osaka M. | Rodionova Ar. | 1:2 (6:4, 4:6, 4:6) | details | 09.09.2017 |
| Japan: Tokyo - Singles - Main |
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| 1/16-finals | Hsieh S-W. | Osaka M. | 2:1 (7:64, 4:6, 6:2) | details | 18.11.2015 |
| Canada: Toronto - Singles - Main |
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| 1/16-finals | Osaka M. | Zhao C. | 0:2 (1:6, 5:7) | details | 27.10.2015 |
| Canada: Saguenay - Singles - Main |
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| 1/16-finals | Hercegovac-Sadikovic A. | Osaka M. | 2:0 (6:3, 6:3) | details | 20.10.2015 |