 USA: M15 Tallahassee, FL - Singles - Main |
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| 1/16-finals | Dunbar J. | Iradukunda G. | 1:2 (6:3, 2:6, 2:6) | details | 03.12.2019 |
| USA: M15 East Lansing, MI - Singles - Main |
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| Quarter-finals | Kingsley C. | Dunbar J. | 2:1 (6:3, 5:7, 6:4) | details | 22.11.2019 |
| 1/8-finals | Hinsching J. | Dunbar J. | 0:2 (1:6, 3:6) | details | 21.11.2019 |
| 1/16-finals | Dunbar J. | Sigouin B. | 2:0 (7:5, 6:1) | details | 20.11.2019 |
| USA: Charlottesville - Singles - Main |
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| 1/32-finals | King K. | Dunbar J. | 2:0 (6:3, 6:4) | details | 29.10.2019 |
| USA: M15 Fayetteville, AR - Singles - Main |
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| Quarter-finals | Dunbar J. | Redlicki Mi. | 0:2 (3:6, 2:6) | details | 25.10.2019 |
| 1/8-finals | Mesquida Berg O. | Dunbar J. | 0:2 (3:6, 3:6) | details | 24.10.2019 |
| 1/16-finals | Dunbar J. | Kirkov V. | 2:1 (3:6, 6:2, 6:1) | details | 23.10.2019 |
| USA: Columbus 3 - Singles - Main |
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| 1/32-finals | Dunbar J. | Shane R. | 0:2 (5:7, 4:6) | details | 17.09.2019 |
| USA: Memphis - Singles - Main |
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| 1/8-finals | King K. | Dunbar J. | 2:1 (1:6, 6:4, 6:3) | details | 15.08.2019 |
| 1/16-finals | Garanganga T. | Dunbar J. | 0:2 (3:6, 1:6) | details | 13.08.2019 |
| USA: M15 Edwardsville - Singles - Main |
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| Quarter-finals | Dunbar J. | Ponwith N. | 1:2 (6:4, 4:6, 5:7) | details | 09.08.2019 |
| 1/8-finals | Dunbar J. | Ross G. | 2:0 (6:2, 6:0) | details | 08.08.2019 |
| 1/16-finals | Shane R. | Dunbar J. | 0:2 (2:6, 2:6) | details | 07.08.2019 |
| USA: M25 Decatur, IL - Singles - Main |
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| 1/8-finals | Rodriguez Taverna S. | Dunbar J. | 2:1 (6:3, 1:6, 7:63) | details | 01.08.2019 |
| 1/16-finals | Nefve A. | Dunbar J. | 1:2 (1:6, 6:2, 0:6) | details | 31.07.2019 |
| USA: M15 Champaign, IL - Singles - Main |
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| 1/16-finals | Dunbar J. | Clark E. | 0:2 (1:6, 3:6) | details | 24.07.2019 |
| USA: Iowa City - Singles - Main |
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| 1/16-finals | Rybakov A. | Dunbar J. | 2:0 (6:1, 6:2) | details | 16.07.2019 |
| USA: M25 Tulsa, OK - Singles - Main |
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| 1/16-finals | Chappell N. | Dunbar J. | 2:0 (6:3, 7:68) | details | 19.06.2019 |
| USA: M25 Wichita, KS - Singles - Main |
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| Quarter-finals | Dunbar J. | Zhu E. | 0:2 (3:6, 63:7) | details | 14.06.2019 |
| 1/8-finals | Redlicki Ma. | Dunbar J. | 0:2 (4:6, 64:7) | details | 13.06.2019 |
| 1/16-finals | Stalder R. | Dunbar J. | 0:2 (0:6, 3:6) | details | 12.06.2019 |
| 1/16-finals | Woldeab S. | Dunbar J. | CAN. | details | 12.06.2019 |
| USA: Bakersfield - Singles - Main |
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| 1/16-finals | Dunbar J. | Watson A. | 1:2 (6:4, 1:6, 3:6) | details | 13.03.2019 |
| USA: Tallahassee - Singles - Main |
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| 1/16-finals | Dunbar J. | Peniston R. | 1:2 (7:65, 1:6, 3:6) | details | 04.12.2018 |
| USA: Waco - Singles - Main |
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| Semi-finals | Geerts M. | Dunbar J. | 2:0 (6:3, 6:3) | details | 30.11.2018 |
| Quarter-finals | Dunbar J. | Zsiga M. | 2:0 (6:1, 6:3) | details | 29.11.2018 |
| 1/8-finals | Dunbar J. | Ghilea V. A. | 2:0 (6:1, 6:3) | details | 28.11.2018 |
| 1/16-finals | Whitehouse M. | Dunbar J. | 0:2 (1:6, 2:6) | details | 27.11.2018 |
| USA: Norman - Singles - Main |
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| 1/8-finals | Zhu E. | Dunbar J. | 2:0 (6:4, 6:3) | details | 15.11.2018 |
| 1/16-finals | Butsch J. | Dunbar J. | 0:2 (1:6, 1:6) | details | 14.11.2018 |
| USA: Harlingen - Singles - Main |
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| 1/16-finals | Maginley J. | Dunbar J. | 2:0 (6:3, 7:64) | details | 16.10.2018 |
| USA: Houston - Singles - Main |
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| 1/16-finals | Dunbar J. | Oliel Y. | 1:2 (6:2, 4:6, 0:6) | details | 09.10.2018 |
| USA: Decatur - Singles - Main |
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| Semi-finals | Alvarez N. | Dunbar J. | 2:1 (1:6, 6:2, 6:4) | details | 04.08.2018 |
| Quarter-finals | Hiltzik A. | Dunbar J. | 0:2 (2:6, 3:6) | details | 03.08.2018 |
| 1/8-finals | Spec M. | Dunbar J. | 0:2 (4:6, 2:6) | details | 02.08.2018 |
| 1/16-finals | Dunbar J. | Chrysochos P. | CAN. | details | 01.08.2018 |
| 1/16-finals | Dunbar J. | Cozbinov A. | 2:0 (6:1, 6:4) | details | 01.08.2018 |
| USA: Champaign - Singles - Main |
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| 1/8-finals | Korda S. | Dunbar J. | 2:0 (7:65, 6:1) | details | 25.07.2018 |
| 1/16-finals | Iradukunda G. | Dunbar J. | 0:2 (4:6, 1:6) | details | 24.07.2018 |
| USA: Iowa City - Singles - Main |
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| 1/16-finals | Dunbar J. | Chappell N. | 1:2 (6:4, 2:6, 5:7) | details | 18.07.2018 |
| USA: Wichita - Singles - Main |
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| 1/8-finals | Dunbar J. | Vukic A. | 1:2 (6:1, 2:6, 3:6) | details | 05.07.2018 |
| 1/16-finals | Dunbar J. | Kessler M. | 2:0 (6:1, 6:0) | details | 04.07.2018 |
| USA: Pittsburgh - Singles - Main |
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| 1/8-finals | Dunbar J. | Gomez A. | 0:2 (3:6, 1:6) | details | 28.06.2018 |
| 1/16-finals | Dunbar J. | Hovhannisyan M. | 2:1 (6:3, 65:7, 6:2) | details | 26.06.2018 |
| USA: Winston-Salem 2 - Singles - Main |
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| 1/16-finals | Riffice S. | Dunbar J. | 2:0 (6:3, 6:4) | details | 20.06.2018 |
| USA: Orange Park - Singles - Main |
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| 1/8-finals | Rodriguez R. | Dunbar J. | 2:0 (7:63, 6:4) | details | 19.04.2018 |
| 1/16-finals | Zapp L. | Dunbar J. | 0:2 (2:6, 64:7) | details | 18.04.2018 |
| USA: Little Rock - Singles - Main |
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| 1/16-finals | Dunbar J. | Ritschard A. | 0:2 (2:6, 3:6) | details | 11.04.2018 |
| USA: Tallahassee - Singles - Main |
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| Semi-finals | Dunbar J. | Uchida K. | 0:2 (3:6, 0:6) | details | 09.12.2017 |