Were Mariaan de Swardt and Ken Rosewall both professional tennis players?
Mariaan de Swardt Mariaan de Swardt (born 18 March 1971) is a former tennis player from South Africa, who played as a professional from 1988 to 2001. She twice represented her native country at the Summer Olympics, in 1992 and 1996, and was a member of the South African Fed Cup Team in 1992 and 1994–1997. In 2006, de Swardt became a U.S. citizen.
1982 Grand Prix (tennis) The 1982 Volvo Grand Prix was a professional tennis circuit held that year. It incorporated the four grand slam tournaments, the Grand Prix tournaments. The circuit was administered by the Men's International Professional Tennis Council (MIPTC). On 30 April 1981 World Championship Tennis (WCT) announced its withdrawal from the Grand Prix circuit, which it had been incorporated into since 1978, and the re-establishment of its own tour calendar for the 1982 season. To counter the threat of player leaving the Grand Prix tour for the WCT the MIPTC introduced a mandatory commitment to play at least 10 Grand Prix Super Series tournaments.