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| Auckland Tier IV Hard | Jan 9 2005 |
| Qual 1 | Galina Voskoboeva(6) - Muller | 2-6 6-3 6-3 |
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| Hobart Tier V Hard | Jan 16 2005 |
| Qual 1 | Muller - Emily Hewson-WC | 6-2 6-3 |
| Qual 2 | Muller - Els Callens(2) | 7-5 6-71 6-0 |
| Qual 3 | Muller - Libuse Prusova | 6-0 3-6 7-5 |
| 1 | Maria Elena Camerin(6) - Muller-Q | 6-1 6-4 |
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| Australian Open Hard | Jan 30 2005 |
| Qual 1 | Muller - Tatiana Poutchek | 6-2 6-1 |
| Qual 2 | Anastasiya Yakimova(16) - Muller | 4-6 6-2 6-2 |
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| Belfort $25,000 Hard | Jan 30 2005 |
| 1 | Kyra Nagy - Muller(8) | 6-3 4-6 6-3 |
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| Sunderland $25,000 Hard | Feb 6 2005 |
| 1 | Mathilde Johansson-LL - Muller(2) | 6-3 2-6 6-4 |
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| Redbridge $25,000 Hard | Feb 13 2005 |
| 1 | Muller(3) - Karolina Kosinska | 1-6 6-0 6-2 |
| 2 | Nika Ozegovic - Muller(3) | 6-3 3-6 6-4 |
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| Antwerp Tier II Carpet | Feb 20 2005 |
| Qual 1 | Katarina Srebotnik(3) - Muller | 6-3 6-3 |
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| Dubai Tier II Hard | Mar 6 2005 |
| Qual 1 | Na Li(5) - Muller-WC | 6-1 6-1 |
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| Indian Wells Tier I Hard | Mar 20 2005 |
| Qual 1 | Mariana Diaz-Oliva(2) - Muller | 6-3 6-4 |
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| Orange $50,000 Hard | Mar 20 2005 |
| Qual 1 | Muller - Michelle Gerards | 6-3 6-3 |
| Qual 2 | Muller - Elise Tamaela | 6-3 7-65 |
| Qual 3 | Mara Santangelo - Muller | 6-2 4-6 6-1 |
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| Redding $25,000 Hard | Mar 27 2005 |
| 1 | Ivana Lisjak-Q - Muller(8) | 7-5 6-3 |
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| Dinan $75,000 Clay | Apr 10 2005 |
| 1 | Muller - Hanna Nooni | 7-5 6-1 |
| 2 | Muller - Conchita Martinez-Granados | 6-4 6-0 |
| QF | Muller - Henrieta Nagyova | 7-65 6-3 |
| SF | Roberta Vinci(2) - Muller | 4-6 7-5 6-4 |
| | |
| Biarritz $25,000 Clay | Apr 17 2005 |
| 1 | Muller(7) - Eveline Vanhyfte-Q | 6-0 6-1 |
| 2 | Muller(7) - Mailyne Andrieux | 6-3 6-1 |
| QF | Muller(7) - Emma Laine(4) | 6-2 6-1 |
| SF | Muller(7) - Selima Sfar(2) | 6-4 6-3 |
| F | Muller(7) - Timea Bacsinszky | 4-6 7-62 6-2 |
| | |
| Estoril Tier IV Clay | May 1 2005 |
| Qual 1 | Muller(4) | bye |
| Qual 2 | Muller(4) - Catarina Lopes Ferreira | 6-4 6-0 |
| Qual 3 | Muller(4) - Stephanie Gehrlein | 6-2 6-3 |
| 1 | Muller-Q - Marta Marrero | 6-4 6-4 |
| 2 | Jie Zheng(9) - Muller-Q | 6-3 6-4 |
| | |
| Berlin Tier I Clay | May 8 2005 |
| Qual 1 | Muller(14) - Maria Geznenge | 6-0 6-2 |
| Qual 2 | Muller(14) - Meilen Tu | 6-3 6-2 |
| 1 | Conchita Martinez - Muller-Q | 6-0 7-65 |
| | |
| Saint Gaudens $50,000 Clay | May 15 2005 |
| 1 | Muller(2) - Virginie Pichet | 6-2 6-0 |
| 2 | Aravane Rezaï - Muller(2) | 6-4 6-4 |
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| Roland Garros Clay | Jun 5 2005 |
| Qual 1 | Muller - Nannan Liu | 6-4 6-1 |
| Qual 2 | Yvonne Meusburger(24) - Muller | 6-4 6-4 |
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| Marseille $50,000 Clay | Jun 12 2005 |
| 1 | Viktoriya Kutuzova - Muller | 2-6 6-4 6-2 |
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| Wimbledon Grass | Jul 3 2005 |
| Qual 1 | Nika Ozegovic - Muller | 6-3 3-6 6-2 |
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| Fano $75,000 Clay | Jul 3 2005 |
| 1 | Muller - Selima Sfar(5) | 4-0 |
| 2 | Muller - Elise Tamaela | 7-5 6-2 |
| QF | Muller - Tina Pisnik | 6-1 4-6 7-5 |
| SF | Kaia Kanepi - Muller | 6-2 6-3 |
| | |
| Cuneo $50,000 Clay | Jul 10 2005 |
| 1 | Ekaterina Bychkova(3) - Muller | 6-4 6-0 |
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| Modena Tier IV Clay | Jul 17 2005 |
| Qual 1 | Agnes Szavay-WC - Muller(8) | 7-67 6-4 |
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| Palermo Tier IV Clay | Jul 24 2005 |
| Qual 1 | Muller(8) - Tatiana Poutchek | 6-4 6-3 |
| Qual 2 | Muller(8) - Sara Errani-WC | 6-3 6-2 |
| Qual 3 | Anastasiya Yakimova(1) - Muller(8) | 6-4 6-3 |
| 1 | Muller-LL - Lucie Safarova | 3-6 6-1 6-1 |
| 2 | Muller-LL - Nuria Llagostera Vives(4) | 4-6 6-1 6-2 |
| QF | Klara Koukalova(5) - Muller-LL | 7-63 5-7 6-2 |
| | |
| Toronto Tier I Hard | Aug 21 2005 |
| Qual 1 | Muller - Nicole Pratt(17) | 6-0 3-6 6-4 |
| Qual 2 | Jie Zheng(8) - Muller | 6-2 6-1 |
| | |
| US Open Hard | Sep 11 2005 |
| Qual 1 | Muller(28) - Stanislava Hrozenska | 6-2 6-4 |
| Qual 2 | Muller(28) - Seiko Okamoto | 6-4 6-2 |
| Qual 3 | Muller(28) - Vilmarie Castellvi | 6-3 1-6 6-1 |
| 1 | Kim Clijsters(4) - Muller-Q | 6-1 6-2 |
| | |
| Bali Tier III Hard | Sep 18 2005 |
| Qual 1 | Muller(1) | bye |
| Qual 2 | Muller(1) - Sophie Ferguson(7) | 4-6 6-1 6-3 |
| 1 | Flavia Pennetta(6) - Muller-Q | 6-3 6-1 |
| | |
| Beijing Tier II Hard | Sep 25 2005 |
| Qual 1 | Muller(7) - Natalie Grandin | 6-0 6-0 |
| Qual 2 | Ting Li (sr) - Muller(7) | 7-5 5-7 6-4 |
| | |
| Seoul Tier IV Hard | Oct 2 2005 |
| Qual 1 | Muller(4) - Miho Saeki | 6-1 7-64 |
| Qual 2 | Muller(4) - Ayumi Morita | 6-0 7-5 |
| Qual 3 | Muller(4) - Edina Gallovits-Hall(5) | 2-6 7-5 6-2 |
| 1 | Muller-Q - Sofia Arvidsson | 4-6 6-1 6-2 |
| 2 | Ai Sugiyama(5) - Muller-Q | 6-4 6-3 |
| | |
| Japan Open Tier III Hard | Oct 9 2005 |
| Qual 1 | Muller(5) - Sunitha Rao | 6-1 6-2 |
| Qual 2 | Junri Namigata - Muller(5) | 7-5 6-1 |
| | |
| Bangkok Tier III Hard | Oct 16 2005 |
| Qual 1 | Muller(4) - Montinee Tangphong | 6-74 6-3 6-3 |
| Qual 2 | Muller(4) - Trudi Musgrave | 7-5 7-5 |
| Qual 3 | Su-Wei Hsieh - Muller(4) | 3-6 6-3 7-5 |
| 1 | Stephanie Foretz Gacon-Q - Muller-LL | 6-2 6-0 |
| | |
| Zurich Tier I Hard | Oct 23 2005 |
| Qual 1 | Sesil Karatantcheva(7) - Muller | 6-1 6-4 |
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| Hasselt Tier III Hard | Oct 30 2005 |
| Qual 1 | Muller(4) - Aravane Rezaï | 4-6 6-2 6-1 |
| Qual 2 | Muller(4) - Vanessa Henke | 2-6 6-2 6-1 |
| Qual 3 | Kaia Kanepi(5) - Muller(4) | 6-3 7-5 |
| | |
| Philadelphia Tier II Hard | Nov 6 2005 |
| Qual 1 | Angelika Bachmann - Muller(3) | 3-6 6-4 6-3 |
| | |
| Toronto $25,000 Hard | Nov 13 2005 |
| 1 | Muller(1) - Tiffany Eklov | 6-4 6-1 |
| 2 | Muller(1) - Sharon Fichman | 6-3 6-2 |
| QF | Muller(1) - Violette Huck-Q | 6-2 4-6 6-4 |
| SF | Aleksandra Wozniak(3) - Muller(1) | 6-3 6-2 |
| | |
| Deauville $50,000 Clay | Nov 20 2005 |
| 1 | Muller(6) - Noemie Scharle | 6-2 6-3 |
| 2 | Eva Birnerova - Muller(6) | 6-0 7-64 |
| | |
| Poitiers $75,000 Hard | Nov 27 2005 |
| 1 | Anastasiya Yakimova - Muller | 5-7 6-2 6-4 |