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.
Magdalena Maleeva was the defending champion, but lost to Dinara Safina in the first round.
The 1999 Warsaw Cup by Heros singles was the singles event of the fifth edition of the Warsaw Open; a WTA Tier IV tournament held in Warsaw, Poland. Conchita Martínez won the tournament last year when it was a Tier III event. She did not compete this year.
There was no defending champion, due to the cancellation of the semifinals in 1998 due to rain.
The 1999 Bank of the West Classic singles was the singles event of the twenty-eighth edition of the first tournament in the US Open Series.
Sandrine Testud was the defending champion, but was defeated by Martina Hingis in the semifinals.
The 1999 Eurotel Slovak Open singles was the tennis singles event of the first edition of the most prestigious tournament in Slovakia. In a final of two future World No. 1s, Amélie Mauresmo defeated Kim Clijsters in straight sets, 6–3, 6–3.
The 1999 Wismilak International singles was the singles event of the fifth edition of the most prestigious women's tennis tournament held in Southeast Asia. It was not played the previous year, so there was no defending champion.
The 1999 Wismilak International doubles was the doubles event of the fifth edition of the most prestigious women's tennis tournament held in Southeast Asia. It was not played the previous year, so there was no defending champion.
Yan Zi and Zheng Jie were the defending champions, but did not participate.
Serena Williams was the defending champion and chose not to compete this year.
Cara Black and Irina Selyutina were the defending champions, but both players turned 18 years old during the season and, therefore, were not eligible to compete in Juniors.
Cara Black was the defending champion, but turned 18 years old during the season and, therefore, was ineligible to compete in Juniors.
Patty Schnyder was the defending champion, but lost in the quarterfinals to Jelena Dokic.
Cara Black was the defending champion, but did not compete this year.
Kim Clijsters and Janette Husárová were the defending champions, but none competed this year. Clijsters decided to focus on the singles tournament, which she ended winning.
Laura Golarsa and Katarina Srebotnik were the defending champions, but none competed this year. Golarsa was injured and couldn't play in the entire season, while Srebotnik competed in the Fed Cup at the same week.
The singles Tournament at the 2004 Gaz de France Stars took place in late September to early October, 2004, on indoor hard courts in Hasselt, Belgium.
Kim Clijsters was the defending champion, but did not compete in 2004.
Kim Clijsters 
