 Argentina: Buenos Aires 2 - Singles - Main |
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| 1/8-finals | Molteni A. | Hartfield D. | 2:0 (6:1, 6:2) | details | 24.11.2010 |
| 1/16-finals | Hartfield D. | Ramirez Hidalgo R. | 2:0 (6:1, 6:3) | details | 23.11.2010 |
 Brazil: Sao Paulo 2 - Singles - Main |
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| 1/16-finals | Hartfield D. | Schukin Y. | 0:2 (3:6, 5:7) | details | 25.10.2010 |
| Argentina: Buenos Aires - Singles - Main |
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| 1/16-finals | Hartfield D. | Brzezicki J. P. | 1:2 (0:6, 7:5, 5:7) | details | 05.10.2010 |
 Colombia: Cali - Singles - Main |
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| 1/16-finals | Hartfield D. | Galdon P. | 0:1 RET. (4:6, 2:4) | details | 28.09.2010 |
| Colombia: Bogota 3 - Singles - Main |
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| 1/16-finals | Hartfield D. | Guidolin R. | 0:1 RET. (2:6) | details | 21.09.2010 |
 Italy: Genova - Singles - Main |
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| 1/16-finals | Trusendi W. | Hartfield D. | 2:0 (6:3, 6:2) | details | 07.09.2010 |
| Italy: Manerbio - Singles - Main |
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| 1/16-finals | Hartfield D. | Darcis S. | 0:2 (4:6, 4:6) | details | 23.08.2010 |
| Colombia: Bucaramanga - Singles - Main |
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| 1/16-finals | Hartfield D. | De Armas Jo. | CAN. | details | 27.01.2009 |
 Chile: Iquique - Singles - Main |
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| 1/8-finals | Hartfield D. | Gaudio G. | 1:2 (1:6, 6:2, 5:7) | details | 22.01.2009 |
| 1/16-finals | Hartfield D. | Morales V. | 2:0 (6:4, 6:3) | details | 20.01.2009 |
 USA: US Open - Singles - Qualification |
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| Final | Hartfield D. | De Heart R. | 1:2 (6:4, 5:7, 63:7) | details | 23.08.2008 |
| Semi-finals | Hartfield D. | Goodall J. | 2:0 (6:4, 6:2) | details | 21.08.2008 |
| Quarter-finals | Falla A. | Hartfield D. | 0:2 (4:6, 1:6) | details | 18.08.2008 |
 France: French Open - Singles - Qualification |
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| Semi-finals | Bozoljac I. | Hartfield D. | 2:1 (7:67, 62:7, 11:9) | details | 21.05.2008 |
| Quarter-finals | Ledovskikh M. | Hartfield D. | 1:2 (7:62, 2:6, 1:6) | details | 20.05.2008 |
| USA: Houston - Singles - Main |
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| 1/16-finals | Capdeville P. | Hartfield D. | 2:0 (6:0, 6:4) | details | 16.04.2008 |
| USA: Memphis - Singles - Main |
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| 1/16-finals | Hartfield D. | Haas T. | 0:2 (3:6, 2:6) | details | 26.02.2008 |
| USA: San Jose - Singles - Main |
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| 1/16-finals | Nishikori K. | Hartfield D. | 2:0 (7:5, 6:3) | details | 21.02.2008 |
| USA: Delray Beach - Singles - Main |
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| 1/8-finals | Reynolds B. | Hartfield D. | 2:1 (7:5, 2:6, 7:6) | details | 14.02.2008 |
| 1/16-finals | Hartfield D. | Haas T. | 2:1 (6:2, 3:6, 6:2) | details | 12.02.2008 |
| Chile: Vina del Mar - Singles - Main |
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| 1/8-finals | Gonzalez F. | Hartfield D. | 2:0 (6:3, 6:4) | details | 01.02.2008 |
| 1/16-finals | Zabaleta M. | Hartfield D. | 0:2 (3:6, 5:7) | details | 28.01.2008 |
 Australia: Australian Open - Main |
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| 1/64-finals | Federer R. | Hartfield D. | 3:0 (6:0, 6:3, 6:0) | details | 15.01.2008 |
 Qatar: Doha - Singles - Main |
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| 1/16-finals | Hartfield D. | Volandri F. | 1:2 (6:4, 3:6, 6:7) | details | 31.12.2007 |
| France: Lyon 2 - Singles - Main |
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| Quarter-finals | Hartfield D. | Gicquel M. | 0:2 (5:7, 3:6) | details | 26.10.2007 |
| 1/8-finals | Monaco J. | Hartfield D. | 0:2 (4:6, 3:6) | details | 24.10.2007 |
| 1/16-finals | Hartfield D. | Mahut N. | 2:0 (7:6, 6:4) | details | 23.10.2007 |
 Russia: Moscow - Singles - Main |
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| 1/16-finals | Kunitsyn I. | Hartfield D. | 2:1 (7:6, 1:6, 6:1) | details | 09.10.2007 |
 Romania: Bucharest - Singles - Main |
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| 1/16-finals | Schukin Y. | Hartfield D. | 2:1 (7:6, 5:7, 6:2) | details | 11.09.2007 |
| USA: US Open - Singles - Main |
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| 1/64-finals | Melzer J. | Hartfield D. | 3:0 (6:4, 7:5, 7:5) | details | 28.08.2007 |
 Poland: Sopot - Singles - Main |
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| 1/16-finals | Montanes A. | Hartfield D. | 2:0 (6:1, 6:3) | details | 30.07.2007 |
 Austria: Kitzbuhel - Singles - Main |
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| 1/8-finals | Calleri A. | Hartfield D. | 2:0 (7:5, 6:2) | details | 26.07.2007 |
| 1/16-finals | Hartfield D. | Hernandez Perez O. | 2:1 (5:7, 6:0, 6:3) | details | 25.07.2007 |
| 1/32-finals | Fischer M. | Hartfield D. | 1:2 (7:5, 4:6, 2:6) | details | 23.07.2007 |
 Germany: Stuttgart - Singles - Main |
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| 1/8-finals | Hartfield D. | Ferrero J. C. | 1:2 (4:6, 6:1, 3:6) | details | 19.07.2007 |
| 1/16-finals | Hajek J. | Hartfield D. | 0:2 (4:6, 2:6) | details | 17.07.2007 |
 Switzerland: Gstaad - Singles - Main |
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| 1/16-finals | Hartfield D. | Gicquel M. | 0:2 (3:6, 6:7) | details | 10.07.2007 |
 United Kingdom: Wimbledon - Singles - Main |
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| 1/64-finals | Zib T. | Hartfield D. | 3:2 (4:6, 7:6, 3:6, 6:3, 6:4) | details | 25.06.2007 |
 Netherlands: Hertogenbosch - Singles - Main |
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| 1/16-finals | Hartfield D. | Berrer M. | 0:2 (3:6, 0:6) | details | 19.06.2007 |