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| Cali $25,000 Clay | Feb 10 2008 |
| 1 | Estefania Craciun - Castiblanco | 7-5 1-6 6-3 |
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| Obregon $10,000 Hard | Apr 6 2008 |
| 1 | Miki Miyamura - Castiblanco | 6-2 6-3 |
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| Los Mochis $10,000 Clay | Apr 13 2008 |
| 1 | Leanne Baker(5) - Castiblanco | 6-1 6-0 |
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| Mazatlan $10,000 Hard | Apr 20 2008 |
| 1 | Castiblanco - Ivette Lopez | 6-1 6-2 |
| 2 | Leanne Baker(4) - Castiblanco | 6-2 6-3 |
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| Toluca $10,000 Hard | Apr 27 2008 |
| 1 | Indire Akiki - Castiblanco | 6-4 6-2 |
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| Bell Ville $10,000 Clay | May 4 2008 |
| Qual 1 | Castiblanco(1) | bye |
| Qual 2 | Castiblanco(1) - Julieta Rodriguez | 6-0 6-2 |
| Qual 3 | Rocio Galarza - Castiblanco(1) | 6-3 7-63 |
| 1 | Castiblanco(1) - Natalia Cheng | 3-6 6-2 6-2 |
| 2 | Nuria Parrizas Diaz - Castiblanco(1) | 6-4 2-6 7-5 |
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| Buenos Aires $10,000 Clay | May 11 2008 |
| 1 | Adriana Pereira - Castiblanco(6) | 2-6 7-65 7-65 |
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| Amarante $10,000 Hard | Jun 8 2008 |
| 1 | Anne Yelsey(2) - Castiblanco | 6-3 6-0 |
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| Montemor-O-Novo $10,000 Hard | Jun 15 2008 |
| 1 | Lucia Sainz-Pelegri - Castiblanco | 6-3 6-76 6-3 |
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| Alcobaca $10,000 Hard | Jun 22 2008 |
| 1 | Castiblanco - Sarah Schneider | 6-3 6-0 |
| 2 | Yera Campos-Molina(1) - Castiblanco | 6-3 6-1 |
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| Getxo $25,000 Clay | Jun 29 2008 |
| Qual 1 | Castiblanco(10) | bye |
| Qual 2 | Castiblanco(10) - Plamena Kurteva | 6-1 6-1 |
| Qual 3 | Paula Fondevila Castro(8) - Castiblanco(10) | 6-1 6-1 |
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| Oviedo $10,000 Hard | Jul 6 2008 |
| 1 | Castiblanco(5) - Lucy Warburton | 6-0 6-4 |
| 2 | Adeline Goncalves - Castiblanco(5) | 6-4 6-1 |
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| Valladolid $25,000 Hard | Jul 13 2008 |
| Qual 1 | Castiblanco(8) | bye |
| Qual 2 | Castiblanco(8) - Olga Kirpicheva | 6-4 3-6 6-4 |
| Qual 3 | Julie Gervais - Castiblanco(8) | 6-0 6-3 |
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| Badajoz $10,000 Hard | Jul 20 2008 |
| 1 | Castiblanco(6) - Viet-Ha Ngo | 3-6 6-2 6-4 |
| 2 | Nuria Parrizas Diaz - Castiblanco(6) | 7-63 7-5 |
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| La Coruna $25,000 Hard | Jul 27 2008 |
| Qual 1 | Castiblanco(2) | bye |
| Qual 2 | Cristina Sanchez-Quintanar - Castiblanco(2) | 6-3 6-0 |
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| Bell Ville $10,000 Clay | Aug 24 2008 |
| 1 | Ingrid Vargas Calvo(7) - Castiblanco | 7-5 3-6 6-4 |
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| Buenos Aires $10,000 Clay | Aug 31 2008 |
| 1 | Castiblanco - Ingrid Vargas Calvo | 7-66 6-4 |
| 2 | Tatiana Bua(8) - Castiblanco | 6-0 6-1 |
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| Buenos Aires $10,000 Clay | Sep 7 2008 |
| 1 | Castiblanco - Catalina Pella | 6-2 7-5 |
| 2 | Estefania Craciun(6) - Castiblanco | 1-6 6-2 6-1 |
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| Serra Negra $10,000 Clay | Sep 28 2008 |
| 1 | Castiblanco(6) - Flavia Borges | 6-2 6-4 |
| 2 | Castiblanco(6) - Eduarda Piai | 6-4 6-2 |
| QF | Castiblanco(6) - Josymar Escalona | 6-4 6-4 |
| SF | Bianca Botto - Castiblanco(6) | 4-6 6-4 6-0 |
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| Curitiba $10,000 Clay | Oct 5 2008 |
| 1 | Castiblanco(6) - Andressa Garcia | 6-3 6-4 |
| 2 | Natalia Cheng - Castiblanco(6) | 2-6 7-5 6-4 |
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| Mogi Das Cruzes $10,000 Clay | Oct 12 2008 |
| 1 | Castiblanco(4) - Flavia Borges | 6-3 6-1 |
| 2 | Maria Claudia Santos Sant'anna - Castiblanco(4) | 6-2 6-2 |
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| Lima $10,000 Clay | Oct 19 2008 |
| 1 | Castiblanco(5) - Maria Claudia Santos Sant'anna | 6-4 6-2 |
| 2 | Castiblanco(5) - Nicole Herzog | 6-3 6-1 |
| QF | Castiblanco(5) - Katarina Poljakova | 3-6 6-4 7-5 |
| SF | Castiblanco(5) - Claudia Razzeto(4) | 6-4 7-61 |
| F | Bianca Botto - Castiblanco(5) | 6-1 6-3 |
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| Lima $10,000 Clay | Oct 26 2008 |
| 1 | Castiblanco(8) - Nikol Hristova | 6-4 6-3 |
| 2 | Patricia Iveth Ku Flores - Castiblanco(8) | 7-66 6-71 6-2 |
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| Lima $10,000 Clay | Nov 2 2008 |
| 1 | Andrea Koch-Benvenuto(8) - Castiblanco | 6-3 7-64 |
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| Asuncion $10,000 Clay | Nov 9 2008 |
| 1 | Castiblanco(5) - Adriana Pereira | 6-3 6-1 |
| 2 | Castiblanco(5) - Isabela Miro | 7-5 6-3 |
| QF | Castiblanco(5) - Cecilia Costa Melgar | 6-4 2-6 6-3 |
| SF | Lucia Jara Lozano - Castiblanco(5) | 6-2 7-5 |
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| Santiago $10,000 Clay | Nov 16 2008 |
| 1 | Castiblanco(7) - Fabiana Chiaparini | 6-4 7-63 |
| 2 | Castiblanco(7) - Josella Francisca Valderrama Ahumada | 6-3 6-3 |
| QF | Cecilia Costa Melgar - Castiblanco(7) | 4-6 6-3 6-2 |