| Player Info |
| Sharapova claimed her second WTA Tour title at the Bell Challenge in Quebec City, Canada. She had won her first title at the AIG Japan Open Tennis Championships in Tokyo. She was the youngest titlist on the WTA Tour in 2003. |
| 2003 Results | |||
| Australian Open | |||
| Rd | Opponent | W/L | Score |
| 1 | Klara Koukalova | L | 4-6, 6-7 (6-8) |
| Pacific Life Open | |||
| Rd | Opponent | W/L | Score |
| 1 | Samantha Reeves | L | 3-6, 6-1, 0-6 |
| NASDAQ-100 Open | |||
| Rd | Opponent | W/L | Score |
| 1 | Els Callens | L | 6-7 (3-7), 1-6 |
| Family Circle Cup | |||
| Rd | Opponent | W/L | Score |
| 1 | Maja Matevzic | L | 4-6, 7-5, 2-6 |
| French Open | |||
| Rd | Opponent | W/L | Score |
| 1 | Magui Serna | L | 3-6, 3-6 |
| DFS Classic | |||
| Rd | Opponent | W/L | Score |
| 1 | Evgenia Koulikovskaya | W | 6-1, 6-1 |
| 2 | Nathalie Dechy | W | 6-3, 6-2 |
| 3 | Marie-Gaianeh Mikaelian | W | 6-0, 7-5 |
| QF | Elena Dementieva | W | 2-6, 7-6 (7-4), 6-2 |
| SF | Shinobu Asagoe | L | 2-6, 6-2, 6-7 (3-7) |
| The Wimbledon Championships | |||
| Rd | Opponent | W/L | Score |
| 1 | Ashley Harkleroad | W | 6-2, 6-1 |
| 2 | Elena Bovina | W | 6-3, 6-1 |
| 3 | Jelena Dokic | W | 6-4, 6-4 |
| 4 | Svetlana Kuznetsova | L | 1-6, 6-2, 5-7 |
| JPMorgan Chase Open | |||
| Rd | Opponent | W/L | Score |
| 1 | Katarina Srebotnik | W | 6-3, 6-1 |
| 2 | Nadia Petrova | W | 6-2, 2-6, 7-5 |
| 3 | Kim Clijsters | L | 4-6, 6-1, 1-6 |
| U.S. Open | |||
| Rd | Opponent | W/L | Score |
| 1 | Virginia Ruano Pascual | W | 6-1, 6-1 |
| 2 | Emilie Loit | L | 3-6, 4-6 |
| Polo Open Shanghai | |||
| Rd | Opponent | W/L | Score |
| 1 | Emilie Loit | W | 6-3, 6-7 (3-7), 6-3 |
| 2 | Maria Sanchez Lorenzo | W | 4-6, 6-3, 6-4 |
| QF | Elena Dementieva | L | 4-6, 6-7 (4-7) |
| Japan Open | |||
| Rd | Opponent | W/L | Score |
| 1 | Jin-Hee Kim | W | 6-2, 6-0 |
| 2 | Akiko Morigami | W | 6-1, 6-3 |
| QF | Claudine Schaul | W | 7-5, 7-6 (7-1) |
| SF | Jie Zheng | W | 6-3, 7-5 |
| F | Aniko Kapros | W | 2-6, 6-2, 7-6 (7-5) |
| Seat Open Luxembourg | |||
| Rd | Opponent | W/L | Score |
| 1 | Kirsten Flipkens | W | 6-2, 7-6 (9-7) |
| 2 | Sofia Arvidsson | W | 6-1, 7-6 (7-4) |
| QF | Anca Barna | W | 4-6, 6-3, 6-2 |
| SF | Kim Clijsters | L | 0-6, 3-6 |
| Bell Challenge | |||
| Rd | Opponent | W/L | Score |
| 2 | Els Callens | W | 6-4, 6-3 |
| QF | Alina Jidkova | W | 6-1, 6-2 |
| SF | Laura Granville | W | 1-6, 6-2, 6-1 |
| F | Milagros Sequera | W | 6-2, retired (ankle) |
