Are Danie Visser and Bob Bryan both professional tennis players?
Bob Bryan Robert Charles Bryan (born April 29, 1978) is an American male professional tennis player. He has won twenty-three Grand Slam titles: 16 in men's doubles and 7 in mixed doubles. He turned professional in 1998. With his twin brother Mike, he has been world No. 1 doubles player for much of the last several years, first achieving the top ranking in September 2003. The brothers were named ATP Team of the Decade for 2000–2009. The brothers became the second men's doubles team to complete the career golden slam at the 2012 Summer Olympics.
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.