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.
Danilo Petrović (tennis) Danilo Petrović (born 24 January 1992) is a Serbian tennis player.