 Austria: Vienna - Singles - Qualification |
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| Quarter-finals | Koellerer D. | Minar I. | 0:2 (4:6, 6:7) | detalhes | 23.10.2010 |
 Poland: Szczecin - Singles - Main |
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| 1/16-finals | Koellerer D. | Cuevas P. | 1:1 RET. (6:2, 4:6, 0:1) | detalhes | 13.09.2010 |
 Croatia: Rijeka - Singles - Main |
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| 1/16-finals | Prpic F. | Koellerer D. | 2:0 (7:5, 6:2) | detalhes | 07.09.2010 |
 Italy: Como - Singles - Main |
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| 1/8-finals | Reister J. | Koellerer D. | 2:0 (6:0, 6:3) | detalhes | 01.09.2010 |
| 1/16-finals | Koellerer D. | Stebe C. | 2:0 (6:4, 6:1) | detalhes | 31.08.2010 |
| Italy: Manerbio - Singles - Main |
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| 1/16-finals | Koellerer D. | Crugnola M. | 1:2 (4:6, 6:4, 5:7) | detalhes | 24.08.2010 |
| Austria: Kitzbuhel - Singles - Main |
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| Quarter-finals | Seppi A. | Koellerer D. | 1:1 RET. (6:4, 4:6, 5:2) | detalhes | 07.08.2010 |
| 1/8-finals | Patience O. | Koellerer D. | 1:2 (6:2, 3:6, 6:7) | detalhes | 06.08.2010 |
| 1/16-finals | Koellerer D. | Lorenzi P. | 2:0 (6:2, 6:2) | detalhes | 03.08.2010 |
| Italy: Cordenons - Singles - Main |
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| 1/16-finals | Haase R. | Koellerer D. | 1:1 RET. (6:1, 6:7) | detalhes | 29.07.2010 |
 Netherlands: Scheveningen - Singles - Main |
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| 1/16-finals | Koellerer D. | Gremelmayr D. | 0:2 (3:6, 3:6) | detalhes | 05.07.2010 |
 Germany: Braunschweig - Singles - Main |
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| 1/16-finals | Rosol L. | Koellerer D. | 2:0 (6:3, 6:3) | detalhes | 29.06.2010 |
| Italy: Reggio Emilia - Singles - Main |
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| Quarter-finals | Delbonis F. | Koellerer D. | 2:1 (6:7, 6:2, 7:6) | detalhes | 25.06.2010 |
| 1/8-finals | Cipolla F. | Koellerer D. | 1:2 (6:4, 4:6, 4:6) | detalhes | 23.06.2010 |
| 1/16-finals | Silva J. | Koellerer D. | 0:2 (2:6, 3:6) | detalhes | 22.06.2010 |
 United Kingdom: London - Singles - Main |
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| 1/32-finals | Navarro I. | Koellerer D. | 2:0 (6:3, 6:4) | detalhes | 07.06.2010 |
 France: French Open - Singles - Main |
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| 1/64-finals | Gabashvili T. | Koellerer D. | 3:0 (6:2, 6:2, 6:1) | detalhes | 25.05.2010 |
| Croatia: Zagreb - Singles - Main |
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| 1/16-finals | Delbonis F. | Koellerer D. | 0:0 RET. (4:1) | detalhes | 10.05.2010 |
| Germany: Munich - Singles - Main |
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| 1/8-finals | Petzschner P. | Koellerer D. | 2:0 (6:1, 6:4) | detalhes | 05.05.2010 |
| 1/16-finals | Koellerer D. | Ancic M. | 2:0 (7:6, 7:5) | detalhes | 04.05.2010 |
| Italy: Roma 2 - Singles - Main |
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| Quarter-finals | Delbonis F. | Koellerer D. | 2:0 (6:2, 6:3) | detalhes | 22.04.2010 |
| 1/8-finals | Veic A. | Koellerer D. | 0:2 (1:6, 2:6) | detalhes | 21.04.2010 |
| 1/16-finals | Rosol L. | Koellerer D. | 0:2 (0:6, 3:6) | detalhes | 20.04.2010 |
| Italy: Roma - Singles - Main |
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| 1/16-finals | Koellerer D. | Vanek J. | 0:2 (4:6, 3:6) | detalhes | 13.04.2010 |
 Morocco: Casablanca - Singles - Main |
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| 1/16-finals | Golubev A. | Koellerer D. | 2:0 (6:2, 7:6) | detalhes | 06.04.2010 |
 USA: Miami - Singles - Main |
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| 1/32-finals | Koellerer D. | Ferrero J. C. | 0:1 RET. (0:4) | detalhes | 26.03.2010 |
| 1/64-finals | Koellerer D. | Rochus C. | 2:1 (4:6, 6:3, 6:2) | detalhes | 24.03.2010 |
| USA: Indian Wells - Singles - Main |
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| 1/32-finals | Koellerer D. | Ferrero J. C. | 0:2 (3:6, 0:6) | detalhes | 14.03.2010 |
| 1/64-finals | Ram R. | Koellerer D. | 0:2 (1:6, 3:6) | detalhes | 12.03.2010 |
 World: Davis Cup Group I - Singles - Main |
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| | Koellerer D. | Klizan M. | 0:2 (2:6, 6:7) | detalhes | 07.03.2010 |
| | Koellerer D. | Lacko L. | 1:3 (6:2, 2:6, 6:7, 3:6) | detalhes | 05.03.2010 |
 Argentina: Buenos Aires - Singles - Main |
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| 1/16-finals | Koellerer D. | Ventura S. | 0:2 (4:6, 2:6) | detalhes | 16.02.2010 |
| Croatia: Zagreb - Singles - Main |
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| 1/8-finals | Cilic M. | Koellerer D. | 2:0 (6:2, 6:1) | detalhes | 04.02.2010 |
| 1/16-finals | Koellerer D. | Golubev A. | 2:1 (6:3, 3:6, 6:3) | detalhes | 02.02.2010 |
 Australia: Australian Open - Singles - Main |
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| 1/64-finals | Koellerer D. | Veic A. | 2:3 (4:6, 6:3, 7:6, 1:6, 4:6) | detalhes | 19.01.2010 |
 Qatar: Doha - Singles - Main |
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| 1/16-finals | Koellerer D. | Becker B. | 2:0 RET. (1:5) | detalhes | 05.01.2010 |
| Austria: Salzburg - Singles - Main |
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| | Nieminen J. | Koellerer D. | 2:0 (6:2, 7:6) | detalhes | 04.12.2009 |
| | Brown D. | Koellerer D. | 1:2 (6:7, 6:0, 4:6) | detalhes | 03.12.2009 |
| | Ignatik U. | Koellerer D. | 0:2 (1:6, 2:6) | detalhes | 02.12.2009 |
 Switzerland: Basel - Singles - Main |
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| | Koellerer D. | Melzer J. | CAN. | detalhes | 03.11.2009 |
| 1/16-finals | Koellerer D. | Lammer M. | 1:2 (6:3, 2:6, 5:7) | detalhes | 03.11.2009 |
| Austria: Vienna - Singles - Main |
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| 1/8-finals | Koellerer D. | Lopez F. | 0:2 (3:6, 3:6) | detalhes | 29.10.2009 |
| 1/16-finals | Koellerer D. | Nieminen J. | 2:0 (6:1, 6:2) | detalhes | 28.10.2009 |
 Russia: Moscow - Singles - Main |
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| 1/16-finals | Koellerer D. | Tipsarevic J. | 0:2 (4:6, 3:6) | detalhes | 20.10.2009 |