 World: Davis Cup - World Group II - Singles - Preliminary |
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| | Garanganga T. | Makzoume Y. | CAN. | details | 07.03.2020 |
| | Garanganga T. | Naw H. | CAN. | details | 06.03.2020 |
 Egypt: M15 Sharm El Sheikh - Singles - Main |
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| 1/16-finals | Garanganga T. | Tessa L. | 1:0 RET. (6:3, 1:3) | details | 05.02.2020 |
 Tunisia: M15 Monastir 4 - Singles - Main |
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| 1/16-finals | Garanganga T. | Herman L. | 0:2 (3:6, 1:6) | details | 29.01.2020 |
| Tunisia: M15 Monastir 3 - Singles - Main |
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| 1/16-finals | Dalla Valle E. | Garanganga T. | 2:0 (6:4, 6:2) | details | 22.01.2020 |
 USA: Memphis - Singles - Main |
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| 1/16-finals | Garanganga T. | Dunbar J. | 0:2 (3:6, 1:6) | details | 13.08.2019 |
| USA: Lexington - Singles - Main |
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| 1/32-finals | Zakharov A. | Garanganga T. | 2:0 (6:1, 6:2) | details | 29.07.2019 |
 Canada: Granby - Singles - Main |
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| 1/16-finals | Garanganga T. | Li Z. | 0:2 (63:7, 66:7) | details | 23.07.2019 |
| 1/32-finals | Okamura I. | Garanganga T. | 0:2 (4:6, 4:6) | details | 22.07.2019 |
| Canada: Winnipeg - Singles - Main |
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| 1/32-finals | Ritschard A. | Garanganga T. | 2:0 (6:4, 6:4) | details | 09.07.2019 |
| USA: M25 Pensacola, FL - Singles - Main |
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| 1/16-finals | Corwin F. | Garanganga T. | 2:0 (6:3, 7:5) | details | 08.05.2019 |
| USA: Vero Beach - Singles - Main |
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| 1/8-finals | Spizzirri E. | Garanganga T. | 2:0 (6:3, 6:4) | details | 03.05.2019 |
| 1/16-finals | Segura M. | Garanganga T. | 0:2 (2:6, 3:6) | details | 30.04.2019 |
| World: Davis Cup - Group II - Singles - Main |
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| | Copil M. | Garanganga T. | 2:0 (6:4, 7:5) | details | 06.04.2019 |
| | Dima D. | Garanganga T. | 2:0 (6:3, 6:3) | details | 05.04.2019 |
| USA: M25 Calabasas, CA - Singles - Main |
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| 1/8-finals | Garanganga T. | Celikbilek A. | 1:2 (3:6, 6:4, 2:6) | details | 21.03.2019 |
| 1/16-finals | Vukic A. | Garanganga T. | 1:2 (6:2, 4:6, 4:6) | details | 20.03.2019 |
| USA: Bakersfield - Singles - Main |
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| 1/8-finals | Wu Tung-Lin | Garanganga T. | 2:0 (6:2, 6:2) | details | 14.03.2019 |
| 1/16-finals | Arias B. | Garanganga T. | 1:2 (7:66, 2:6, 1:6) | details | 13.03.2019 |
 Germany: M25 Nussloch - Singles - Main |
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| Quarter-finals | Garanganga T. | van Rijthoven T. | 0:2 (4:6, 65:7) | details | 25.01.2019 |
| 1/8-finals | Okala J. | Garanganga T. | 1:2 (6:4, 3:6, 64:7) | details | 24.01.2019 |
| 1/16-finals | Kern R. | Garanganga T. | 1:2 (6:4, 4:6, 4:6) | details | 22.01.2019 |
| USA: Champaign - Singles - Main |
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| 1/8-finals | Garanganga T. | Smith J. P. | 0:2 (3:6, 4:6) | details | 14.11.2018 |
| 1/16-finals | Clark E. | Garanganga T. | 1:2 (3:6, 6:0, 3:6) | details | 13.11.2018 |
 Mexico: Los Cabos - Singles - Main |
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| 1/16-finals | Fabbiano T. | Garanganga T. | 2:1 (5:7, 6:2, 7:5) | details | 31.07.2018 |
| Mexico: Los Cabos - Singles - Qualification |
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| Final | Garanganga T. | Patino L. | 2:1 (6:2, 0:6, 7:67) | details | 30.07.2018 |
| Semi-finals | King E. | Garanganga T. | 1:2 (62:7, 6:4, 65:7) | details | 29.07.2018 |
| Canada: Granby - Singles - Main |
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| 1/16-finals | Dancevic F. | Garanganga T. | 2:0 (6:4, 6:4) | details | 25.07.2018 |
| World: Davis Cup - Group II - Singles - Main |
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| | Przysiezny M. | Garanganga T. | CAN. | details | 08.04.2018 |
| | Majchrzak K. | Garanganga T. | 2:0 (6:2, 6:2) | details | 07.04.2018 |
 Japan: Kyoto - Singles - Main |
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| 1/16-finals | Uchida K. | Garanganga T. | 1:0 RET. (6:4, 3:1) | details | 21.02.2018 |
| World: Davis Cup - Group II - Singles - Main |
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| | Garanganga T. | Celikbilek A. | CAN. | details | 04.02.2018 |
| USA: Las Vegas - Singles - Main |
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| 1/16-finals | Garanganga T. | Hiltzik J. | 0:2 (2:6, 2:6) | details | 17.10.2017 |
| USA: Fountain Valley - Singles - Main |
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| 1/16-finals | Garanganga T. | Geerts M. | 1:2 (6:4, 3:6, 5:7) | details | 26.09.2017 |
| USA: Laguna Niguel - Singles - Main |
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| Quarter-finals | Garanganga T. | Johnson T. A. | 0:2 (4:6, 3:6) | details | 22.09.2017 |
| 1/8-finals | Garanganga T. | Brooksby J. | 2:0 (6:3, 7:5) | details | 21.09.2017 |
| 1/16-finals | Garanganga T. | Dischinger E. | 2:1 (6:2, 3:6, 6:3) | details | 20.09.2017 |
| Canada: Vancouver - Singles - Main |
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| 1/16-finals | Garanganga T. | Fritz T. | 0:2 (3:6, 2:6) | details | 16.08.2017 |
| USA: Decatur - Singles - Main |
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| 1/16-finals | Garanganga T. | Smith R. | 0:2 (2:6, 1:6) | details | 02.08.2017 |
| USA: Champaign 2 - Singles - Main |
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| 1/8-finals | Baughman D. | Garanganga T. | 2:0 (6:3, 6:4) | details | 26.07.2017 |
| 1/16-finals | Bandres J. | Garanganga T. | 1:2 (6:4, 1:6, 4:6) | details | 25.07.2017 |
| World: Davis Cup - Group III - Singles - Promotion |
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| | Garanganga T. | Mzai I. | 2:1 (6:4, 3:6, 7:5) | details | 22.07.2017 |
| World: Davis Cup - Group III - Singles - Main |
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| | Garanganga T. | Emmanuel S. | 0:2 (3:6, 5:7) | details | 19.07.2017 |
 United Kingdom: Eastbourne - Singles - Qualification |
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| Semi-finals | Kuznetsov An. | Garanganga T. | 2:0 (6:0, 6:3) | details | 24.06.2017 |
| USA: Little Rock - Singles - Main |
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| 1/16-finals | Hiltzik J. | Garanganga T. | 2:1 (6:3, 64:7, 6:4) | details | 12.04.2017 |
