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. She lost only one set the tournament (to Lindsay Davenport in the semifinals). She 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. This was also the second-ever all-Russian major final (the first being at the French Open earlier in the year, where Myskina defeated Dementieva).
Justine Henin was the defending champion, but lost to Nadia Petrova
in the fourth round. As a result, Amélie Mauresmo took over the world No. 1 ranking for the first time following the tournament despite losing to Dementieva in the quarterfinals.
This was also the first US Open main draw appearance for the 2011 champion Samantha Stosur. She was beaten by Petrova in the second round.
The quarterfinal match in this tournament between Serena Williams and Jennifer Capriati is often considered the main catalyst for the International Tennis Federation adoption of Hawk-Eye triangulation technology as an official method of reviewing line calls.[citation needed] Hawk-Eye was used by television coverage during the match, with results suggesting 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 referee awarded the point to Capriati. Capriati ultimately ended up winning the deuce, the set, and thus the match. Following outcry from spectators and the press, the United States Tennis Association suspended official Mariana Alves for the remainder of the tournament and apologized to Williams.[1] The ITF tested the Hawk-Eye system in an official capacity the next year, ultimately approving it for official use.