2003 US Open – Women's singles
Justine Henin-Hardenne defeated her rival Kim Clijsters in the final, 7–5, 6–1 to win the women's singles tennis title at the 2003 US Open. She lost only one set during the tournament. Clijsters' loss in the final was her last defeat at the US Open until 2012 (only playing in three of the next eight editions of the US Open), as she would go on to win her next 22 US Open matches, including three titles in 2005, 2009 and 2010. Serena Williams was the defending champion, but did not participate due  to injury. Defending finalist and her sister Venus Williams also withdrew before the tournament due to injury. Their withdrawals marked the first time in the Open Era that neither of the previous year's finalists played at the US Open. This was also the only Major tournament between the 1997 Australian Open and the 2011 French Open (a span of 56 events) where neither of the Williams sisters competed. This was also the first US Open main draw appearance of future champion Flavia Pennetta; she lost to Svetlana Kuznetsova in the first round. 2003 US Open – Women's singles Justine