 Finlândia: Tampere - Individual - Principal |
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| 16avos final | Olaso G. | Nieminen T. | 2:1 (4:6, 6:4, 6:2) | detalhes | 22.07.2013 |
 Suécia: Bastad - Individual - Qualificação |
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| Quartos final | Bachinger M. | Nieminen T. | 2:0 (6:4, 6:1) | detalhes | 06.07.2013 |
 Itália: Vercelli - Individual - Principal |
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| 16avos final | Nieminen T. | Baldi F. | 0:2 (4:6, 2:6) | detalhes | 09.04.2013 |
 Reino Unido: Bath - Individual - Principal |
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| 16avos final | Nieminen T. | Willis M. | 0:2 (1:6, 4:6) | detalhes | 12.03.2013 |
| Reino Unido: Shrewsbury - Principal |
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| Quartos final | Goodall J. | Nieminen T. | 2:0 (6:3, 7:6) | detalhes | 08.03.2013 |
| Oitavos final | Findel-Hawkins J. | Nieminen T. | WO. | detalhes | 07.03.2013 |
| 16avos final | Carpenter J. | Nieminen T. | 0:2 (1:6, 3:6) | detalhes | 06.03.2013 |
| Reino Unido: Cardiff - Individual - Principal |
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| 16avos final | Nieminen T. | Marsalek J. | 1:2 (6:4, 4:6, 5:7) | detalhes | 26.02.2013 |
| Reino Unido: Wirral - Individual - Principal |
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| Quartos final | Smethurst D. | Nieminen T. | 2:0 (6:2, 6:0) | detalhes | 07.02.2013 |
| Oitavos final | Chadaj A. | Nieminen T. | 1:2 (6:3, 5:7, 2:6) | detalhes | 06.02.2013 |
| 16avos final | Pauffley N. | Nieminen T. | 1:2 (6:4, 4:6, 2:6) | detalhes | 05.02.2013 |
| Reino Unido: Sheffield - Individual - Principal |
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| 16avos final | Nieminen T. | Krstin P. | CAN. | detalhes | 29.01.2013 |
| Reino Unido: Preston - Individual - Principal |
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| 16avos final | Fitzpatrick A. | Nieminen T. | 2:0 (6:3, 6:2) | detalhes | 22.01.2013 |
 Mundo: Davis Cup Group I - Individual - Principal |
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| | Nieminen T. | Nielsen F. | 2:3 (3:6, 3:6, 6:3, 6:2, 1:6) | detalhes | 21.10.2012 |
| | Nieminen T. | Pedersen M. | 0:3 (2:6, 3:6, 3:6) | detalhes | 19.10.2012 |
 Alemanha: Essen - Individual - Principal |
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| Meias finais | Struff J.-L. | Nieminen T. | 2:0 (7:6, 6:1) | detalhes | 13.10.2012 |
| Quartos final | Huta Galung J. | Nieminen T. | 0:2 (4:6, 4:6) | detalhes | 12.10.2012 |
| Oitavos final | Puetz T. | Nieminen T. | 1:2 (6:3, 3:6, 4:6) | detalhes | 11.10.2012 |
| 16avos final | Pierot M. | Nieminen T. | 0:2 (4:6, 6:7) | detalhes | 09.10.2012 |
| Alemanha: Leimen - Individual - Principal |
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| Meias finais | Ehrat S. | Nieminen T. | 2:0 (6:3, 6:4) | detalhes | 06.10.2012 |
| Quartos final | Vatutin A. | Nieminen T. | 0:1 RET. (0:6, 0:3) | detalhes | 05.10.2012 |
| Oitavos final | Pauffley N. | Nieminen T. | 0:2 (2:6, 4:6) | detalhes | 04.10.2012 |
| 16avos final | Woerner P. | Nieminen T. | 1:2 (2:6, 6:2, 3:6) | detalhes | 02.10.2012 |
| Suécia: Falun - Individual - Principal |
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| Quartos final | Nieminen T. | Milton J. | 1:2 (3:6, 6:1, 5:7) | detalhes | 27.09.2012 |
| Oitavos final | Nieminen T. | Brunstrom Jo. | 2:0 (6:1, 6:1) | detalhes | 26.09.2012 |
| 16avos final | Nieminen T. | Tubic I. | 2:0 (6:1, 6:3) | detalhes | 25.09.2012 |
| Suécia: Danderyd-Stockholm - Individual - Principal |
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| Final | Arvidsson I. | Nieminen T. | 2:0 (7:6, 6:3) | detalhes | 22.09.2012 |
| Meias finais | Eleskovic E. | Nieminen T. | 0:2 (5:7, 1:6) | detalhes | 21.09.2012 |
| Quartos final | Berta D. | Nieminen T. | 0:2 (6:7, 0:6) | detalhes | 20.09.2012 |
| Oitavos final | Paukku J. | Nieminen T. | 0:2 (4:6, 2:6) | detalhes | 19.09.2012 |
| 16avos final | Olin R. | Nieminen T. | 1:2 (3:6, 7:5, 3:6) | detalhes | 18.09.2012 |
| Finlândia: Kotka - Individual - Principal |
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| Meias finais | Ivanov V. | Nieminen T. | 2:0 (6:4, 6:4) | detalhes | 17.08.2012 |
| Quartos final | Penaud A. | Nieminen T. | 1:2 (7:5, 6:7, 0:6) | detalhes | 16.08.2012 |
| Oitavos final | Goldsteiner P. | Nieminen T. | 1:2 (3:6, 7:5, 0:6) | detalhes | 15.08.2012 |
| 16avos final | Kontinen M. | Nieminen T. | 0:2 (3:6, 3:6) | detalhes | 14.08.2012 |
| Finlândia: Vierumaki - Individual - Principal |
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| Meias finais | Nieminen T. | Sekulic M. | 1:2 (6:2, 4:6, 4:6) | detalhes | 11.08.2012 |
| Quartos final | Nieminen T. | Wennakoski M. | 2:0 (6:3, 6:1) | detalhes | 10.08.2012 |
| Oitavos final | Nieminen T. | Goldsteiner P. | 2:0 (6:3, 6:1) | detalhes | 09.08.2012 |
| 16avos final | Nieminen T. | Rivera C. | 2:0 (6:1, 6:2) | detalhes | 07.08.2012 |
| Finlândia: Tampere - Individual - Principal |
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| 16avos final | Nieminen T. | Laaksonen H. | 0:2 (64:7, 4:6) | detalhes | 24.07.2012 |
 Países Baixos: Scheveningen - Individual - Principal |
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| Oitavos final | Schukin Y. | Nieminen T. | 2:1 (65:7, 6:1, 6:3) | detalhes | 11.07.2012 |