 Austria: Salzburg - Singles - Main |
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| 1/16-finals | Bloemke D. | Muster T. | 2:1 (3:6, 6:2, 6:3) | details | 16.11.2011 |
| Austria: Vienna - Singles - Main |
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| 1/16-finals | Muster T. | Thiem D. | 0:2 (2:6, 3:6) | details | 25.10.2011 |
 Italy: Palermo - Singles - Main |
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| 1/16-finals | Di Mauro A. | Muster T. | 2:0 (6:2, 6:4) | details | 03.10.2011 |
 Spain: Madrid - Singles - Main |
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| 1/16-finals | Muster T. | Janowicz J. | 0:0 CAN. | details | 27.09.2011 |
| Italy: Todi - Singles - Main |
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| 1/8-finals | Fischer M. | Muster T. | 2:1 (6:0, 2:6, 7:62) | details | 15.09.2011 |
| 1/16-finals | Muster T. | Mayer L. | 2:1 (4:6, 7:5, 6:2) | details | 13.09.2011 |
| Italy: Manerbio - Singles - Main |
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| 1/16-finals | Munoz-De La Nava D. | Muster T. | 2:0 (6:2, 6:3) | details | 23.08.2011 |
| Italy: Cordenons - Singles - Main |
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| 1/16-finals | Galvani S. | Muster T. | 2:0 (6:0, 6:3) | details | 16.08.2011 |
 San Marino: San Marino - Singles - Main |
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| 1/16-finals | Balleret B. | Muster T. | 2:1 (4:6, 7:5, 6:2) | details | 08.08.2011 |
| Austria: Kitzbuhel - Singles - Main |
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| 1/16-finals | Muster T. | Kohlschreiber P. | 0:2 (3:6, 0:6) | details | 01.08.2011 |
 Germany: Braunschweig - Singles - Main |
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| 1/16-finals | Muster T. | Gabashvili T. | 1:2 (6:3, 3:6, 4:6) | details | 28.06.2011 |
| Italy: Milan - Singles - Main |
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| 1/16-finals | Riba P. | Muster T. | 2:0 (6:3, 6:1) | details | 14.06.2011 |
| Germany: Halle - Singles - Qualification |
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| Quarter-finals | Muster T. | Bubka S. | 1:2 (1:6, 6:4, 4:6) | details | 04.06.2011 |
 Croatia: Zagreb - Singles - Main |
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| 1/16-finals | Alcaide-Justell G. | Muster T. | 2:0 (6:3, 6:4) | details | 10.05.2011 |
| Italy: Napoli - Singles - Main |
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| 1/16-finals | Muster T. | Ignatik U. | 0:2 (3:6, 5:7) | details | 18.04.2011 |
| Italy: Rome - Singles - Main |
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| 1/16-finals | Muster T. | Stebe C. | 0:2 (0:6, 3:6) | details | 12.04.2011 |
| Italy: Monza - Singles - Main |
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| 1/16-finals | Muster T. | Guez D. | 0:2 (5:7, 2:6) | details | 05.04.2011 |
| Italy: Barletta - Singles - Main |
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| 1/16-finals | Fischer M. | Muster T. | 2:0 (6:0, 6:3) | details | 30.03.2011 |
| Austria: Salzburg - Singles - Main |
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| 1/16-finals | Muster T. | Haider-Maurer A. | 0:2 (3:6, 1:6) | details | 16.11.2010 |
| Austria: Vienna - Singles - Main |
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| 1/16-finals | Haider-Maurer A. | Muster T. | 2:0 (6:2, 7:6) | details | 26.10.2010 |
| 1/16-finals | Gulbis E. | Muster T. | CAN. | details | 26.10.2010 |
| Italy: Palermo - Singles - Main |
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| 1/16-finals | Muster T. | Naso G. | 0:2 (3:6, 0:6) | details | 04.10.2010 |
 Slovenia: Ljubljana - Singles - Main |
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| 1/8-finals | Muster T. | Di Mauro A. | 0:2 (3:6, 2:6) | details | 22.09.2010 |
| 1/16-finals | Puc B. | Muster T. | 0:2 (3:6, 1:6) | details | 21.09.2010 |
| Croatia: Rijeka - Singles - Main |
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| 1/16-finals | Muster T. | Setkic A. | 1:2 (4:6, 6:2, 3:6) | details | 07.09.2010 |
| Italy: Como - Singles - Main |
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| 1/16-finals | Muster T. | Naso G. | 0:2 (3:6, 4:6) | details | 31.08.2010 |
| Austria: Kitzbuhel - Singles - Main |
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| 1/16-finals | Brown D. | Muster T. | 2:0 (6:4, 6:4) | details | 04.08.2010 |
| Germany: Braunschweig - Singles - Main |
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| 1/16-finals | Niland C. | Muster T. | 2:0 (6:2, 6:1) | details | 29.06.2010 |
 France: French Open - Singles - Main |
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| 1/64-finals | Lapentti N. | Muster T. | 3:1 (2:6, 6:1, 6:2, 7:64) | details | 24.05.1999 |
| Austria: St. Poelten - Singles - Main |
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| 1/16-finals | Muster T. | Koubek S. | 0:2 (3:6, 4:6) | details | 17.05.1999 |
| Italy: Rome - Singles - Main |
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| 1/32-finals | Muster T. | Chang M. | 1:2 (65:7, 7:64, 4:6) | details | 10.05.1999 |
 Monaco: Monte Carlo - Singles - Main |
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| 1/16-finals | Alami K. | Muster T. | 2:0 (6:3, 6:3) | details | 21.04.1999 |
| 1/32-finals | Muster T. | Johansson T. | 2:0 (6:3, 6:4) | details | 19.04.1999 |
 Portugal: Estoril - Singles - Main |
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| 1/16-finals | Muster T. | Mantilla F. | 0:2 (3:6, 2:6) | details | 05.04.1999 |
 Morocco: Casablanca - Singles - Main |
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| 1/16-finals | Muster T. | Van Herck J. | 1:2 (4:6, 6:4, 4:6) | details | 22.03.1999 |
 USA: Indian Wells - Singles - Main |
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| 1/32-finals | Kuerten G. | Muster T. | 2:0 (6:2, 6:4) | details | 08.03.1999 |
| USA: Scottsdale - Singles - Main |
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| 1/16-finals | Gimelstob J. | Muster T. | 2:0 (6:4, 7:5) | details | 01.03.1999 |
 United Arab Emirates: Dubai - Singles - Main |
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| 1/8-finals | Muster T. | Moya C. | 0:2 (4:6, 4:6) | details | 10.02.1999 |
| 1/16-finals | Huet S. | Muster T. | 0:2 (4:6, 2:6) | details | 08.02.1999 |
 Australia: Australian Open - Singles - Main |
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| 1/64-finals | Muster T. | Schalken S. | 1:3 (6:2, 3:6, 3:6, 3:6) | details | 18.01.1999 |
| Australia: Sydney - Singles - Main |
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| Semi-finals | Muster T. | Martin T. | 0:2 (2:6, 1:6) | details | 16.01.1999 |
| Quarter-finals | Stoltenberg J. | Muster T. | 1:2 (6:3, 2:6, 3:6) | details | 15.01.1999 |
| 1/8-finals | Muster T. | Moya C. | 2:0 (7:64, 7:5) | details | 13.01.1999 |
| 1/16-finals | Bjorkman J. | Muster T. | 1:2 (5:7, 7:62, 3:6) | details | 11.01.1999 |
 Colombia: Bogota - Singles - Main |
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| 1/16-finals | Malisse X. | Muster T. | 2:0 (7:5, 6:1) | details | 02.11.1998 |
| Austria: Vienna - Singles - Main |
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| 1/8-finals | Rusedski G. | Muster T. | 2:0 (6:4, 6:3) | details | 13.10.1998 |
| 1/16-finals | Muster T. | Siemerink J. | 2:0 (6:2, 6:4) | details | 12.10.1998 |
| Spain: Mallorca - Main |
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| Semi-finals | Muster T. | Kuerten G. | 0:2 (5:7, 5:7) | details | 03.10.1998 |