Defending champion Venus Williams defeated her sister Serena Williams in the final, 6–2, 6–4 to win the women's singles tennis title at the 2001 US Open. It was her fourth major singles title, and she did not lose a set during the tournament. The championship match was the first of nine major finals contested by the sisters, and the first US Open women's singles final to take place during American television prime time.
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.
Mariana Díaz Oliva is a former professional tennis player from Argentina.
The WTA Tour is the elite tour for professional women's tennis organised by the Women's Tennis Association (WTA). The WTA Tour includes the four Grand Slam tournaments, the WTA Tour Championships and the WTA Tier I, Tier II, Tier III, Tier IV and Tier V events. ITF tournaments are not part of the WTA Tour, although they award points for the WTA World Ranking.
The 2001 Estoril Open was a tennis tournament played on outdoor clay courts at the Estoril Court Central in Oeiras in Portugal and was part of the International Series of the 2001 ATP Tour and of Tier IV of the 2001 WTA Tour. The tournament ran from 9 April until 15 April 2001. Juan Carlos Ferrero and Ángeles Montolio won the singles titles.
Patricia Wartusch was the defending champion but lost in the second round to Mariana Díaz Oliva.
Arantxa Sánchez Vicario won in the final 6–3, 6–1 against Magüi Serna.
Tathiana Garbin was the defending champion but lost in the second round to Émilie Loit.
The 2001 Croatian Bol Ladies Open was a women's tennis tournament played on outdoor clay courts in Bol, Croatia and was part of the Tier III category of the 2001 WTA Tour. It was the eighth edition of the tournament and was held from 30 April until 6 May 2001. Third-seeded Ángeles Montolio won the singles title and earned $27,000 first-prize money.
Tina Pisnik was the defending champion but lost in the quarterfinals to Ángeles Montolio.
The 1999 Dreamland Egypt Classic singles was the singles event of the only edition of the Dreamland Egypt Classic; a WTA Tier III tournament and then the most prestigious women's tennis tournament held in Africa. Arantxa Sánchez Vicario won it, defeating Irina Spîrlea, 6–1, 6–0, in the final.
Amanda Coetzer won in the final 2–6, 6–1, 6–2 against Elena Dementieva.
The 1999 Egger Tennis Festival singles was the singles event of the 29th edition of the Egger Tennis Festival; a Tier IV tournament and the second most prestigious women's tennis event held in Austria. Patty Schnyder, the defending champion, was upset in the first round by qualifier Lenka Němečková.
The 1999 Pilot Pen Tennis singles was the singles event of the seventeenth edition of the final tournament in the US Open Series. Steffi Graf was the defending champion, but had retired after the TIG Classic.
Ángeles Montolio was the defending champion, but lost in quarterfinals to Anca Barna.
Holly Parkinson-Hasler is a former professional tennis player from the United States.
Martina Hingis was the defending champion, but did not compete this year.
Players who neither had high enough rankings nor received wild cards to enter the main draw of the annual French Open Tennis Championships participated in a qualifying tournament held in the week before the event.
Players who neither had high enough rankings nor received wild cards to enter the main draw of the annual French Open Tennis Championships participated in a qualifying tournament held in the week before the event.
Zsófia Gubacsi was the defending champion, but lost in the quarterfinals to Gisela Dulko.