Were Menno Oosting and Liezel Huber both professional tennis players?
Liezel Huber Liezel Huber (née Horn; born 21 August 1976) is a South African-American retired tennis player who represents the United States internationally. Huber has won four Grand Slam titles in women's doubles with partner Cara Black, one with Lisa Raymond, and two mixed doubles titles with Bob Bryan. On 12 November 2007, she became the co-World No. 1 in doubles with Cara Black. On 19 April 2010, Huber became the sole No. 1 for the first time in her career.
1973 Dutch Open (tennis) The 1973 Dutch Open was a combined men's and women's tennis tournament staged in Hilversum, Netherlands. The men's event was part of the Grand Prix circuit and categorized in Group C. The tournament was played on outdoor clay courts and was held from 16 July to 23 July 1973. It was the 17th edition of the tournament. Tom Okker and Betty Stöve won the singles titles.