Are Danie Visser and Bob Bryan both professional tennis players?
Danie Visser Danie Visser (born 26 July 1961) is a former professional tennis player from South Africa. A doubles specialist, he won 3 Grand Slam men's doubles titles (2 Australian Open and 1 US Open). Visser reached the World No. 1 doubles ranking in January 1990.
Udo Riglewski Udo Riglewski (born 28 July 1966, in Lauffen am Neckar, Baden-Württemberg), is a former professional tennis player from Germany. He enjoyed most of his tennis success while playing doubles. During his career he won 10 doubles titles and finished runner-up an additional 10 times. He achieved a career-high doubles ranking of World No. 6 in 1991.