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.
Ruben Bemelmans Ruben Bemelmans (] , born 14 January 1988) is a Belgian male professional tennis player. His career-high ATP rankings are world No. 84 in singles, achieved in September 2015, and world No. 128 in doubles, achieved in October 2012. As a qualifier, Bemelmans reached the quarterfinals of Vienna in 2013, defeating No. 4 seed Philipp Kohlschreiber en route.