Serena Williams defeated the two-time defending champion, her sister Venus Williams, in a rematch of the previous year's final, 6–4, 6–3 to win the women's singles tennis title at the 2002 US Open. It was her second US Open singles title, her fourth major singles title overall, the third component of her first "Serena Slam", and her second consecutive major title won without losing a set.
Defending champion Venus Williams defeated Justine Henin in the final, 6–1, 3–6, 6–0 to win the ladies' singles tennis title at the 2001 Wimbledon Championships. It was her second Wimbledon singles title and third major singles title overall.
Two-time defending champion Serena Williams defeated Elena Dementieva in the final, 6–1, 6–1 to win the women's singles tennis title at the 2004 Miami Open.
Lindsay Davenport was the defending champion but lost in the quarterfinals to Serena Williams.
Martina Hingis was the defending champion but lost in the semifinals to Venus Williams.
Jana Novotná was the defending champion but lost in the semifinals to Lindsay Davenport.
The 1999 Sydney International women's singles was the singles event of the fourteenth edition of the ASB Classic; a WTA Tier II tournament and the second most prestigious women's tennis tournament held in Australia. Arantxa Sánchez Vicario was the defending champion but lost in the quarterfinals to Barbara Schett.
The 1999 Nokia Cup was a WTA Tier IV tournament held in Prostějov, Czech Republic, and the only edition of the Nokia Cup. Slovak Henrieta Nagyová won in the final 7–6(7–2), 6–4 against Silvia Farina.
The 1999 Lipton Championships women's singles was the women's singles event of the fifteenth edition of the tennis tournament played at Miami, United States. It is the third WTA Tier I tournament of the year, and part of the US Spring tennis season. Venus Williams was the defending champion, and she successfully defending her title by defeating her sister Serena in the final 6–1, 4–6, 6–4.
The 1999 Family Circle Cup singles was the singles event of the twenty-seventh edition of the tennis tournament played at Hilton Head, United States. It is the third WTA Tier I tournament of the year, and part of the US Spring tennis season. Amanda Coetzer was the defending champion but lost in the third round to Henrieta Nagyová.
Venus Williams was the defending champion but lost to her sister, Serena Williams, 2–6, 2–6 in the semifinals. Serena Williams won the title by beating first seeded Jennifer Capriati, 7–5, 7–6(7–4) in the final.
The 1999 Swisscom Challenge singles was the singles event of the sixteenth edition of the Swisscom Challenge; a WTA Tier I tournament and the most prestigious tournament held in Switzerland. Lindsay Davenport was the two-time defending champion, but she did not compete this year.
Jelena Dokic was the defending champion, but lost in third round to Anastasia Myskina.
Sandrine Testud was the defending champion, but was defeated by Martina Hingis in the semifinals.
Venus Williams was the defending champion, but lost in the third round to Tatiana Golovin.
Martina Hingis was the two-time defending champion, but retired in the semifinals against Lindsay Davenport.
Lindsay Davenport was the two-time defending champion, but she withdrew due to injury.
Lindsay Davenport was the defending champion, and she successfully defended her title, defeating Jelena Dokic in the final, 6–4, 6–1.
The 2000 Generali Ladies Linz was the 2000 Tier II WTA Tour tournament of the annually-held Generali Ladies Linz women's tennis tournament. It was the 14th edition of the tournament and was held from 17 October until 22 October 2000 at the TipsArena Linz in Linz, Austria. First-seeded Lindsay Davenport won the singles title.
Venus Williams was the defending champion, but she chose not to compete this year.
Lindsay Davenport 
