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| Auckland Tier IV Hard | Jan 5 2003 |
| Qual 1 | Santangelo - Ma. Emilia Salerni | 6-4 6-4 |
| Qual 2 | Sarah Taylor(2) - Santangelo | 6-3 6-0 |
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| Australian Open Hard | Jan 26 2003 |
| Qual 1 | Santangelo - Mi-Ra Jeon(18) | 6-3 7-62 |
| Qual 2 | Santangelo - Roberta Vinci | 6-3 6-4 |
| Qual 3 | Melinda Czink - Santangelo | 6-2 2-6 6-1 |
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| Ortisei $50,000 Carpet | Feb 2 2003 |
| 1 | Santangelo - Ludmila Cervanova(5) | 7-5 6-3 |
| 2 | Santangelo - Caroline Dhenin-Q | 4-6 6-1 6-4 |
| QF | Santangelo - Roberta Vinci | 6-2 6-1 |
| SF | Santangelo - Klara Zakopalova(7) | 6-4 3-0 |
| F | Santangelo - Sofia Arvidsson | 2-6 6-2 6-2 |
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| Doha Tier III Hard | Feb 16 2003 |
| Qual 1 | Oleksandra Kravets - Santangelo(8) | 4-6 7-5 7-5 |
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| Dubai Tier II Hard | Feb 23 2003 |
| Qual 1 | Anca Barna(1) - Santangelo | 6-3 6-3 |
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| Key Biscayne Tier I Hard | Mar 30 2003 |
| Qual 1 | Santangelo - Milagros Sequera(21) | 6-0 7-62 |
| Qual 2 | Maria Sanchez Lorenzo(5) - Santangelo | 3-6 7-5 7-63 |
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| Casablanca Tier V Clay | Apr 6 2003 |
| 1 | Patricia Wartusch(6) - Santangelo | 6-4 6-3 |
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| Dinan $50,000 Clay | Apr 13 2003 |
| 1 | Santangelo(5) - Galina Fokina | 7-5 6-1 |
| 2 | Santangelo(5) - Magdalena Zdenovcova-Q | 6-2 0-1 |
| QF | Evgenia Kulikovskaya(1) - Santangelo(5) | 6-3 6-1 |
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| Cagnes-Sur-Mer $75,000 Clay | May 4 2003 |
| 1 | Melinda Czink - Santangelo | 6-1 7-64 |
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| Rome Tier I Clay | May 18 2003 |
| Qual 1 | Virginie Razzano(3) - Santangelo | 6-3 2-6 6-3 |
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| Roland Garros Clay | Jun 8 2003 |
| Qual 1 | Nina Duebbers - Santangelo(15) | 2-6 6-3 6-1 |
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| Surbiton $25,000 Grass | Jun 8 2003 |
| 1 | Tara Snyder - Santangelo(7) | 6-3 6-2 |
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| Wimbledon Grass | Jul 6 2003 |
| Qual 1 | Santangelo(12) - Francesca Lubiani | 6-0 6-1 |
| Qual 2 | Eva Birnerova - Santangelo(12) | 6-4 7-69 |
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| Orbetello $50,000 Clay | Jul 6 2003 |
| 1 | Santangelo - Galina Fokina-Q | 6-0 6-3 |
| 2 | Gala Leon-Garcia(2) - Santangelo | 6-4 6-4 |
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| Palermo Tier V Clay | Jul 13 2003 |
| Qual 1 | Ivana Abramovic - Santangelo(4) | 1-6 7-5 7-5 |
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| Modena $50,000 Clay | Jul 20 2003 |
| 1 | Santangelo - Tatiana Poutchek | 6-2 6-4 |
| 2 | Maret Ani - Santangelo | 6-74 6-2 6-1 |
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| Innsbruck $50,000 Clay | Jul 27 2003 |
| 1 | Lubomira Bacheva-Q - Santangelo | 6-1 6-4 |
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| Bronx $50,000 Hard | Aug 17 2003 |
| 1 | Antonella Serra-Zanetti(2) - Santangelo | 6-3 6-72 6-3 |
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| US Open Hard | Sep 7 2003 |
| Qual 1 | Santangelo(19) - Jane O'Donoghue | 6-2 4-6 6-3 |
| Qual 2 | Santangelo(19) - Lubomira Bacheva | 6-0 6-74 6-4 |
| Qual 3 | Santangelo(19) - Barbora Strycova | 6-2 6-2 |
| 1 | Tathiana Garbin - Santangelo-Q | 4-6 7-66 6-4 |
| | |
| Fano $50,000 Clay | Sep 7 2003 |
| 1 | Santangelo - Raffaella Bindi-WC | 6-1 6-2 |
| 2 | Catalina Castano - Santangelo | 6-4 6-2 |
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| Denain $75,000 Clay | Sep 14 2003 |
| 1 | Anastassia Rodionova - Santangelo | 6-4 0-6 6-2 |
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| Leipzig Tier II Carpet | Sep 28 2003 |
| Qual 1 | Santangelo - Laura Siegemund-WC | 6-2 6-3 |
| Qual 2 | Tina Pisnik(2) - Santangelo | 6-1 6-2 |
| | |
| Latina $50,000 Clay | Oct 12 2003 |
| 1 | Santangelo(7)-WC - Paula Garcia | 6-1 6-4 |
| 2 | Oleksandra Kravets - Santangelo(7)-WC | 6-2 2-6 6-3 |
| | |
| Luxembourg Tier III Hard | Oct 26 2003 |
| Qual 1 | Santangelo(8) - Mariya Koryttseva | 6-4 4-6 6-2 |
| Qual 2 | Santangelo(8) - Mandy Minella-WC | 7-68 6-2 |
| Qual 3 | Stephanie Foretz(4) - Santangelo(8) | 6-4 6-4 |
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| Poitiers $50,000 Hard | Nov 2 2003 |
| 1 | Michaela Pastikova - Santangelo | 6-1 6-4 |
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| Pittsburgh $50,000 Hard | Nov 9 2003 |
| 1 | Santangelo - Marie-Eve Pelletier-Q | 4-6 7-62 6-3 |
| 2 | Santangelo - Amy Frazier(1) | 2-6 6-3 6-4 |
| QF | Shenay Perry - Santangelo | 6-2 6-1 |
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| Eugene $50,000 Hard | Nov 16 2003 |
| 1 | Santangelo - Meilen Tu | 6-2 6-1 |
| 2 | Santangelo - Tatiana Poutchek(6) | 6-3 6-4 |
| QF | Sofia Arvidsson(4) - Santangelo | 4-6 6-4 6-3 |