See main article: 2004 US Open (tennis).
Svetlana Kuznetsova defeated Elena Dementieva in the final, 6–3, 7–5 to win the women's singles tennis title at the 2004 US Open. It was her first major title, and she lost only one set during the tournament (to Lindsay Davenport in the semifinals). Kuznetsova became the third Russian woman, after Anastasia Myskina and Maria Sharapova (who won the French Open and Wimbledon, respectively, earlier in the season), to win a major that year and overall. This was also the second-ever all-Russian major final (the first being at the French Open earlier in the season, where Myskina defeated Dementieva).
Justine Henin was the defending champion, but was defeated by Nadia Petrova in the fourth round. As a result, Amélie Mauresmo became the new world No. 1 following the tournament.
This marked the first US Open main draw appearance for 2011 champion Samantha Stosur, who was defeated by Petrova in the second round.
The quarterfinal match between Serena Williams and Jennifer Capriati is often considered the catalyst for the International Tennis Federation adoption of Hawk-Eye triangulation technology to review line calls.[1] Hawk-Eye was unofficially used for television coverage for the match, with results suggesting that several crucial points awarded to Capriati were incorrectly called. The most egregious of these errors was a potential Williams winner at deuce in the first game of the final set that appeared to be well within the left baseline; while the line judge called the ball in, the chair umpire Mariana Alves overruled to award the point to Capriati. Capriati ultimately ended up winning the deuce, the set, and the match. Following outcry from spectators and the press, the United States Tennis Association suspended Alves for the remainder of the tournament and apologized to Williams.[2] The ITF tested the Hawk-Eye system in an official capacity the next year, ultimately approving it for official use.
See main article: article and 2004 US Open – Women's singles qualifying.
| Category |  Kuznetsova | Dementieva | |
|---|---|---|---|
| 1st serve % | 30/54 (56%) | 51/71 (72%) | |
| 1st serve points won | 19 of 30 = 63% | 28 of 51 = 55% | |
| 2nd serve points won | 15 of 24 = 63% | 7 of 20 = 35% | |
| Total service points won | 34 of 54 = 62.96% | 35 of 71 = 49.30% | |
| Aces | 3 | 0 | |
| Double faults | 0 | 4 | |
| Winners | 33 | 7 | |
| Unforced errors | 35 | 22 | |
| Net points won | 11 of 13 = 88% | 4 of 5 = 80% | |
| Break points converted | 5 of 10 = 50% | 3 of 3 = 100% | |
| Return points won | 36 of 71 = 51% | 20 of 54 = 37% | |
| Total points won | bgcolor=98FB989 | 70 | 55 |
| Source | |||