Question: Did Robin White and Margaret Court play professional tennis? 

Context articles: 1969 British Hard Court Championships
List of Grand Slam mixed doubles champions
1992 Nutri-Metics Bendon Classic
Bob Ryland
Margaret Court
Pam Teeguarden
Laxmi Poruri
Robin White (tennis)
Marty Riessen
1971 Australian Open

The 1969 British Hard Court Championships was a combined men's and women's tennis tournament played on outdoor clay courts at The West Hants Club in Bournemouth in England.
 It was the 40th edition of the tournament and the second edition in the Open Era of tennis.
 The tournament was held from 28 April through 3 May 1969.
 John Newcombe, seeded first, and Margaret Court won the first open singles titles while the men's team of Bob Hewitt and Frew McMillan and the women's team of Margaret Court and Judy Tegart won the doubles titles.
 The poor state of the courts led to a protest by a number of players.
 The tournament made a financial loss due to higher expenses compared to the previous edition and poor weather during the final two days.
While many mixed doubles tennis players have won at least one title in each of the four Majors, a career slam, only one mixed doubles team has won the coveted "Grand Slam", all four titles in a single calendar year, Margaret Court and Ken Fletcher in 1963.
 Margaret Court and Owen Davidson also won an individual "Grand Slam" with different partners.
The 1992 Nutri-Metics Bendon Classic was a women's tennis tournament played on outdoor hard courts at the ASB Tennis Centre in Auckland in New Zealand that was part of Tier V of the 1992 WTA Tour.
 It was the seventh edition of the tournament and was held from 27 January February through 2 February 1992.
 Unseeded Robin White won the singles title.
Bob Ryland (born 1920) is an American former tennis player and coach who is known for being the first African-American to play professional tennis.
 Ryland has coached some of the world’s top-ranked professionals, including; Harold Solomon, Renee Blount, Leslie Allen, Arthur Ashe, Bruce Foxworth, Venus Williams and Serena Williams.
 Ryland has also taught and coached at clubs in Bermuda, Puerto Rico, St. Alban’s Tennis Club in Washington, D.C. and the Mid-Town Tennis Club in Manhattan.
 Ryland was inducted into the Wayne State University Athletic Hall of Fame (1991), Black Tennis Hall of Fame (2009), and the Eastern Tennis Hall of Fame in 2002, where he also received a Lifetime Achievement Award in 2012.
Margaret Court {'1': ", '2': ", '3': ", '4': "} (née Smith; born 16 July 1942), also known as Margaret Smith Court, is a retired Australian tennis player and former world No. 1.
 She is currently a Christian minister in Perth, Western Australia.
 In tennis, she amassed more major titles than any other player in history.
Pam Teeguarden (born April 17, 1951) is a former American professional tennis player in the 1970s and 1980s, ranked in the top 20 from 1970–1975, according to "John Dolan's Women's Tennis Ultimate Guide", prior to computer rankings.
 She won two Grand Slam Doubles Titles and was a quarter finalist in singles at the U.S. Open and The French Open.
 Her father Jerry, a well known coach, helped Margaret Court win the coveted Grand Slam (all four Grand Slam titles in one year) in 1970 and Virginia Wade to her 1977 Wimbledon triumph.
 Teeguarden was voted the "Most Watchable Player" based on play and appearance by a group of Madison Avenue advertising executives or "Mad Men" while playing at the US Open.
 Teeguarden played in 19 consecutive US Opens, holding the record until Chris Evert played in 20.
 She wore the first all black outfit in the history of tennis in 1975 at The Bridgestone Doubles Championships in Tokyo, starting a trend that is still popular today.
 Teeguarden was the first woman tennis player signed by Nike.
 She played on the victorious Los Angeles Strings Team Tennis team in 1981 and won the Team Tennis Mixed Doubles Division with Tom Gullikson in 1977; they were also runners-up in the league that year.
Laxmi Poruri-Madan (born November 9, 1972 in Guntur, India) is a retired professional tennis player and the first Indian-American female to play professional tennis on the WTA Tour in the modern era.
Robin White (born December 10, 1963) is a former professional tennis player from the United States.
Marty Riessen (born December 4, 1941) played amateur and professional tennis in the 1960s and 1970s.
 He was ranked as high as No. 11 in the world in singles on the ATP Rankings in September 1974, though was ranked as high as World No. 8 by Lance Tingay of The Daily Telegraph in 1971, before the computer rankings.
 Renowned for his doubles play, Riessen was also a regular doubles partner of Australian tennis great Margaret Court, winning six of his seven major mixed titles and a career grand slam alongside her.
 Additionally a winner of two men's doubles grand slams, his highest doubles ranking was No. 3 on March 3, 1980.
The 1971 Australian Open, also known under its sponsored name Dunlop Australian Open, was a tennis tournament played on outdoor grass courts at the White City Stadium in Sydney, New South Wales, Australia from 7 to 14 March.
 The tournament was originally scheduled to be played in Melbourne but was moved to Sydney on account of a $125,000 sponsorship deal with Dunlop.
 The tournament date was moved from its regular January slot to March to accommodate scheduling requirements made by the commercial promotors World Championship Tennis and National Tennis League.
 It was the 59th edition of the Australian Open, the 17th and final one held in Sydney, and the first Grand Slam tournament of the year.
 The tournament was part of the 1971 World Championship Tennis circuit.
 The singles titles were won by Australians Ken Rosewall and Margaret Court.
 The tiebreak was introduced for all sets except the deciding set.