Belgian Open (tennis) However, Sabine Appelmans, Kim Clijsters and Els Callens all won the doubles event. 1987: Knokke 1988-89: Brussels 1992: Waregem 1993: Liège 1999-2001: Antwerp Belgian Open (tennis) The Belgian Open was a WTA Tour tennis event held over three different periods during 1987–2002. The competition took place in July during 1987–1989 and 2002, and in May during 1992–1993 and 1999–2001. During 2000–2001 it was sponsored by Dutch clothing chain Mexx and renamed the "Benelux Open". The competition was played on outdoor clay courts. The tournament was a Tier V event in 1992 and 2001. The tournament was a Tier IV event
1971 US Open – Women's Singles 1971 US Open – Women's Singles Two-time reigning champion Margaret Court did not defend her title. Billie Jean King defeated Rosemary Casals 6–4, 7–6 (5-2) in the final to win the Women's Singles tennis title at the 1971 US Open. This tournament was notable for being the first Grand Slam appearance in which Chris Evert competed in the main draw, she made it to the semi-final. She competed in 19 consecutive US Open tournaments until her retirement in 1989. The seeded players are listed below. Billie Jean King is the champion; others show the round in which they were eliminated.