| Singles | |
|---|---|
| 2003 Nordea Nordic Light Open | |
| Champion |  Anna Pistolesi |
| Runner-up |  Jelena Kostanić |
| Score | 4–6, 6–4, 6–0 |
| Draw | 32 (2WC/4Q/2LL) |
| Seeds | 8 |
Svetlana Kuznetsova was the defending champion but chose to compete at Los Angeles during the same week, reaching the quarterfinals.
Anna Pistolesi won the title by defeating qualifier Jelena Kostanić 4–6, 6–4, 6–0 in the final. [1] [2] [3]
| Semifinals | Final | ||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 8 | K Šprem | 6 | 6 | ||||||||||||||||||||||||
 C Torrens Valero | 0 | 0 | 8 | K Šprem | 65 | 7 | 6 | ||||||||||||||||||||
| WC |  S Arvidsson | 5 | 4 |  B Rittner | 77 | 5 | 4 | ||||||||||||||||||||
| B Rittner | 7 | 6 | 8 | K Šprem | w/o | ||||||||||||||||||||||
| Q |  S Kleinová | 1 | 2 | 4 |  P Mandula | ||||||||||||||||||||||
 T Perebiynis | 6 | 6 | T Perebiynis | 2 | 2 | ||||||||||||||||||||||
 An Serra Zanetti | 1 | 2 | 4 | P Mandula | 6 | 6 | |||||||||||||||||||||
| 4 | P Mandula | 6 | 6 | 8 | K Šprem | 3 | 6 | 4 | |||||||||||||||||||
| 6 | A Barna | 3 | 4 | 2 | A Pistolesi | 6 | 1 | 6 | |||||||||||||||||||
 Ľ Cervanová | 6 | 6 | Ľ Cervanová | w/o | |||||||||||||||||||||||
| K Koukalová | 0 | 7 | 4 | H Nagyová | |||||||||||||||||||||||
| H Nagyová | 6 | 5 | 6 | Ľ Cervanová | 3 | 0 | |||||||||||||||||||||
| Q | R Kuti-Kis | 6 | 4 | 1 | 2 | A Pistolesi | 6 | 6 | |||||||||||||||||||
 M Casanova | 3 | 6 | 6 | M Casanova | 2 | 3 | |||||||||||||||||||||
| Q | J Hlaváčková | 3 | 4 | 2 | A Pistolesi | 6 | 6 | ||||||||||||||||||||
| 2 | A Pistolesi | 6 | 6 | ||||||||||||||||||||||||
Defending champion Serena Williams defeated Jennifer Capriati in a rematch of the previous year's final, 4–6, 6–4, 6–1 to win the women's singles tennis title at the 2003 Miami Open.
The 1999 SEAT Open Luxembourg singles was the singles event of the ninth edition of the most prestigious women's tennis tournament held in Luxembourg. Mary Pierce was the reigning champion but she did not compete in this year.
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Elena Dementieva was the defending champion, but lost in second round to Jelena Kostanić.
Martina Hingis was the defending champion, but did not compete this year.
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Anna Smashnova-Pistolesi was the defending champion, but was forced to retire in her second round match against Sandra Kleinová due to a hamstring injury.
Elena Bovina and Zsófia Gubacsi were the defending champions, but Bovina decided to compete in Charleston at the same week. Gubacsi teamed up with Katarina Dašković and lost in first round to wildcards Vanessa Menga and Ana Catarina Nogueira.
Justine Henin-Hardenne was the defending champion, but withdrew from the tournament due to injury.
Paola Suárez was the defending champion, but chose not to compete in 2004.
Patricia Wartusch and Petra Mandula were the defending champions, but Mandula chose not to compete in 2003. Wartusch played with Rita Grande, but lost in the first round.
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Svetlana Kuznetsova and Arantxa Sánchez Vicario were the defending champions, but none competed this year.
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Evgenia Kulikovskaya and Sandra Načuk were the defending champions, but Kulikovskaya did not compete this year.