Philadelphia Freedoms (1974) Dick and Ken Butera as a charter member of WTT in 1973. The team began play in WTT's inaugural 1974 season. The Freedoms played their home matches at the Spectrum. The centerpiece of the team was tennis legend Billie Jean King who served as its player-coach. King became the first woman to coach a professional sports team that included male players. Once King was signed on with the Freedoms, her good friend Elton John decided to write and record the song "Philadelphia Freedom" to wish her luck on her new venture with WTT and for the team to use as
USTA Billie Jean King National Tennis Center Stadium, and was completed in time for the 2018 US Open. In July 2008, the USTA Billie Jean King National Tennis Center and Arthur Ashe Stadium hosted its first ever non-tennis event, when the New York Liberty of the Women's National Basketball Association (WNBA) played in the "Liberty Outdoor Classic: 2008". The game itself was a historic event as it was the first ever professional basketball regular season game ever played outdoors in the USA, by either men or women. The contest featured the Indiana Fever defeating the New York Liberty. USTA Billie Jean King National Tennis Center is the