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.
Kenneth Carlsen Kenneth Carlsen (born 17 April 1973) is a Danish former professional tennis player, who was active between 1992 and 2007. Carlsen played left-handed with a one-handed backhand. His greatest asset was his powerful serve, and his game was therefore best suited to fast surfaces (grass and hardcourt) . For most of his long career Carlsen was Denmark's best tennis player, and consistently among the few Danish players playing at the highest international level. He was awarded as best Danish "Tennis Player of the Year" seven times by the Danish Tennis Federation (first time in 1991, last time in 2005). Two times the award went to the Danish Davis Cup team, of which Kenneth Carlsen until 2003 was a central part (having a 29–13 record in singles).