The 2001 Energis Open tennis tournament was played in Amsterdam, Netherlands in July 2001.
Marion Maruska was the defending champion but lost in the first round to Meike Babel.
The 1999 ASB Classic – Doubles was the doubles event of the fourteenth edition of the ASB Classic; a WTA Tier IV tournament and the most prestigious women's tennis tournament held in New Zealand. Nana Miyagi and Tamarine Tanasugarn were the defending champions but did not compete that year.
The 1999 Copa Colsanitas – Doubles was the doubles event of the second edition of the Copa Colsanitas; a WTA Tier IV tournament and the most prestigious women's tennis tournament held in Colombia and Hispanic America. Janette Husárová and Paola Suárez were the defending champions but only Suárez competed that year with Laura Montalvo.
The 1999 Evert Cup – Singles was the singles event of the eleventh edition of the tennis tournament played at Indian Wells, California, United States. It is the second WTA Tier I tournament of the year, and part of the US Spring tennis season. World No. 1 Martina Hingis was the defending champion but lost in the quarterfinals to Chanda Rubin.
The 1999 Estoril Open – Women's Doubles was the doubles event of the first edition of the WTA Tour Estoril Open; a WTA Tier IV tournament and the most prestigious women's tennis tournament held in Portugal. This tournament was part of the ITF Tour last year, and it was won by Caroline Dhenin and Émilie Loit. They did not compete in the event this year.
This tournament took place between April 9 and 15, 2001.
The 1999 Australian Open – Mixed Doubles was the mixed doubles event of the eighty-seventh edition of the Australian Open, the first Grand Slam of the year. Venus Williams and Justin Gimelstob were the defending champions but did not compete that year.
Michaëlla Krajicek was the defending champion, but lost in the First Round to Séverine Brémond.
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.
Richard Krajicek was the defending champion, but he withdrew prior to his quarterfinal match this year.
The 1999 Tashkent Open – Doubles was the doubles event of the first edition of the Tashkent Open; a WTA Tier IV tournament and the most prestigious women's tennis tournament held in Central Asia.
Fabrice Santoro was the defending champion, but lost in the second round this year.
The 1999 Sanex Trophy – Singles was the singles event of the first edition of the Sanex Trophy; a WTA Tier IV tournament and one of the most prestigious women's tennis tournament held in Belgium.
Raluca Olaru and Valeria Solovyeva won the first edition of the tournament over first seeded Anna-Lena Grönefeld and Květa Peschke with the score 2–6, 7–6(7–3), [11–9].
This was the first edition of the tournament. Gero Kretschmer and Alexander Satschko won the title, defeating Víctor Estrella Burgos and João Souza in the final, 7–5, 7–6(7–3).
This was the first edition of the tournament.
This was the first edition of the tournament. Raven Klaasen and Rajeev Ram won the title, defeating Pablo Carreño Busta and Mariusz Fyrstenberg in the final, 7−6(7-2), 7−5.
Elitsa Kostova was the defending champion from the event's previous edition as an ITF Women's Circuit tournament, but lost in the first round of qualifying to Barbora Štefková.
Feliciano López and Marc López were the defending champions, but lost to Julio Peralta and Horacio Zeballos in the first round.
