| Singles | |
|---|---|
| 2004 JPMorgan Chase Open | |
| Champion |  Lindsay Davenport |
| Runner-up | Serena Williams |
| Final score | 6–1, 6–3 |
| Draw | 56 |
| Seeds | 16 |
Kim Clijsters was the defending champion, but did not compete this year due to a recovery from a cyst surgery.
Lindsay Davenport won the tournament, defeating Serena Williams 6–1, 6–3 in the final.
The first eight seeds received a bye into the second round.
Serena Williams (final) Venus Williams (semifinal, retired due to a right wrist sprain) Lindsay Davenport (champion)
Elena Dementieva (semifinal) Svetlana Kuznetsova (quarterfinals)
Ai Sugiyama (third round) Nadia Petrova (quarterfinals) Vera Zvonareva (quarterfinals)
Patty Schnyder (second round)
Anna Smashnova-Pistolesi (third round)
Francesca Schiavone (quarterfinals) Silvia Farina Elia (first round)
Fabiola Zuluaga (first round) Chanda Rubin (third round) Amy Frazier (third round) Meghann Shaughnessy (first round)| Quarterfinals | Semifinals | Final | ||||||||||||||||||
| 1/PR | Serena Williams | 4 | 6 | 6 | ||||||||||||||||
| 8 | Vera Zvonareva | 6 | 3 | 3 | ||||||||||||||||
| 1/PR | Serena Williams | 6 | 77 | |||||||||||||||||
| 4 | Elena Dementieva | 3 | 62 | |||||||||||||||||
| 4 | Elena Dementieva | 5 | 6 | 6 | ||||||||||||||||
| 5 | Svetlana Kuznetsova | 7 | 2 | 2 | ||||||||||||||||
| 1/PR | Serena Williams | 1 | 3 | |||||||||||||||||
| 3 | Lindsay Davenport | 6 | 6 | |||||||||||||||||
| 7 | Nadia Petrova | 1 | 1 | |||||||||||||||||
| 3 | Lindsay Davenport | 6 | 6 | |||||||||||||||||
| 3 | Lindsay Davenport | 7 | 2 | |||||||||||||||||
| 2/PR | Venus Williams | 5 | 0r | |||||||||||||||||
| 11 | Francesca Schiavone | 5 | 1 | |||||||||||||||||
| 2/PR | Venus Williams | 7 | 6 | |||||||||||||||||
| First round | Second round | Third round | Quarterfinals | ||||||||||||||||||||||||
| 1/PR | S Williams | 6 | 77 | ||||||||||||||||||||||||
 E Daniilidou | 4 | 6 | 6 | E Daniilidou | 1 | 63 | |||||||||||||||||||||
| WC | T Ashley | 6 | 1 | 3 | 1/PR | S Williams | 6 | 6 | |||||||||||||||||||
| J Craybas | 67 | 63 |  A Parra Santonja | 0 | 3 | ||||||||||||||||||||||
| A Parra Santonja | 79 | 77 | A Parra Santonja | 6 | 77 | ||||||||||||||||||||||
 A Barna | 6 | 6 | A Barna | 0 | 62 | ||||||||||||||||||||||
| 13 | F Zuluaga | 1 | 1 | 1/PR | S Williams | 4 | 6 | 6 | |||||||||||||||||||
| 12 | S Farina Elia | 2 | 4 | 8 | V Zvonareva | 6 | 3 | 3 | |||||||||||||||||||
| A Morigami | 6 | 6 | A Morigami | 2 | 2 | ||||||||||||||||||||||
 T Tanasugarn | 6 | 4 | 4 |  M Bartoli | 6 | 6 | |||||||||||||||||||||
| M Bartoli | 2 | 6 | 6 | M Bartoli | 2 | 3 | |||||||||||||||||||||
 T Pisnik | 4 | 6 | 6 | 8 | V Zvonareva | 6 | 6 | ||||||||||||||||||||
 B Strýcová | 6 | 4 | 2 | T Pisnik | |||||||||||||||||||||||
| 8 | V Zvonareva | w/o | |||||||||||||||||||||||||
| First round | Second round | Third round | Quarterfinals | ||||||||||||||||||||||||
| 4 | E Dementieva | 6 | 6 | ||||||||||||||||||||||||
| S Obata | 5 | 5 | Q | L Osterloh | 4 | 2 | |||||||||||||||||||||
| Q | L Osterloh | 7 | 7 | 4 | E Dementieva | 7 | 710 | ||||||||||||||||||||
| Q | A Spears | 3 | 4 | 14 | C Rubin | 5 | 68 | ||||||||||||||||||||
| I Benešová | 6 | 6 | I Benešová | 6 | 1 | 2 | |||||||||||||||||||||
| Q | M Irvin | 2 | 6 | 65 | 14 | C Rubin | 4 | 6 | 6 | ||||||||||||||||||
| 14 | C Rubin | 6 | 1 | 77 | 4 | E Dementieva | 5 | 6 | 6 | ||||||||||||||||||
| 10 | A Smashnova-Pistolesi | 6 | 6 | 5 | S Kuznetsova | 7 | 2 | 2 | |||||||||||||||||||
| V Ruano Pascual | 2 | 1 | 10 | A Smashnova-Pistolesi | 77 | 6 | |||||||||||||||||||||
 D Hantuchová | 6 | 6 | D Hantuchová | 65 | 4 | ||||||||||||||||||||||
 C Black | 2 | 4 | 10 | A Smashnova-Pistolesi | 3 | 0 | |||||||||||||||||||||
 G Dulko | 2 | 2 | 5 | S Kuznetsova | 6 | 6 | |||||||||||||||||||||
 M Vento-Kabchi | 6 | 6 | M Vento-Kabchi | 3 | 3 | ||||||||||||||||||||||
| 5 | S Kuznetsova | 6 | 6 | ||||||||||||||||||||||||
| First round | Second round | Third round | Quarterfinals | ||||||||||||||||||||||||
| 7 | N Petrova | 6 | 6 | ||||||||||||||||||||||||
| WC | J Kirkland | 6 | 6 | WC | J Kirkland | 2 | 3 | ||||||||||||||||||||
| T Garbin | 1 | 3 | 7 | N Petrova | 6 | 6 | |||||||||||||||||||||
 J Kostanić | 77 | 2 | 6 | J Kostanić | 3 | 2 | |||||||||||||||||||||
| M Suchá | 65 | 6 | 2 | J Kostanić | 6 | 77 | |||||||||||||||||||||
| L Lee-Waters | 1 | 7 | 4 | 9 | P Schnyder | 1 | 65 | ||||||||||||||||||||
| 9 | P Schnyder | 6 | 5 | 6 | 7 | N Petrova | 1 | 1 | |||||||||||||||||||
| 15 | A Frazier | 6 | 6 | 3 | L Davenport | 6 | 6 | ||||||||||||||||||||
| A Jidkova | 2 | 2 | 15 | A Frazier | 6 | 6 | |||||||||||||||||||||
 B Schett | 6 | 6 | B Schett | 4 | 4 | ||||||||||||||||||||||
 C Schaul | 3 | 4 | 15 | A Frazier | 2 | 4 | |||||||||||||||||||||
| LL | A Kremer | 6 | 5 | 6 | 3 | L Davenport | 6 | 6 | |||||||||||||||||||
| L Granville | 3 | 7 | 0 | LL | A Kremer | 5 | 2 | ||||||||||||||||||||
| 3 | L Davenport | 7 | 6 | ||||||||||||||||||||||||
| First round | Second round | Third round | Quarterfinals | ||||||||||||||||||||||||
| 6 | A Sugiyama | 6 | 6 | ||||||||||||||||||||||||
 N Pratt | 0 | 77 | 6 | N Pratt | 2 | 4 | |||||||||||||||||||||
 P Mandula | 6 | 63 | 4 | 6 | A Sugiyama | 3 | 6 | 63 | |||||||||||||||||||
| C Martínez | 4 | 4 | 11 | F Schiavone | 6 | 0 | 77 | ||||||||||||||||||||
| N Dechy | 6 | 6 | N Dechy | 65 | 2 | ||||||||||||||||||||||
| S Perry | 0 | 3 | 11 | F Schiavone | 77 | 6 | |||||||||||||||||||||
| 11 | F Schiavone | 6 | 6 | 11 | F Schiavone | 5 | 1 | ||||||||||||||||||||
| 16 | M Shaughnessy | 62 | 6 | 5 | 2/PR | V Williams | 7 | 6 | |||||||||||||||||||
 J Janković | 77 | 2 | 7 | J Janković | 6 | 3 | 5 | ||||||||||||||||||||
| Q |  V Castellvi | 3 | 2 | E Likhovtseva | 2 | 6 | 7 | ||||||||||||||||||||
| E Likhovtseva | 6 | 6 | E Likhovtseva | 1 | 1 | ||||||||||||||||||||||
| WC | A Harkleroad | 6 | 6 | 2/PR | V Williams | 6 | 6 | ||||||||||||||||||||
| S Asagoe | 3 | 2 | WC | A Harkleroad | 2 | 1 | |||||||||||||||||||||
| 2/PR | V Williams | 6 | 6 | ||||||||||||||||||||||||
Serena Williams defeated Martina Hingis in the final, 6–3, 7–6(7–4), to win the women's singles tennis title at the 1999 US Open. It was her first major singles title, the first of an eventual Open Era joint-record seven US Open titles, and the first of an eventual Open Era record 23 major singles titles. Williams became the first African American woman to win a singles major in the Open Era.
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