Who is older, Bob Bryan or Mariaan de Swardt?
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.
Hans van Swol Albertus Christiaan "Hans" van Swol (] ; 22 August 1914 – 20 May 2010) was a Dutch tennis player. He was five-fold Dutch singles champion (1938, 1940, 1941, 1948 and 1949). He reached the fourth round at Wimbledon on five different occasions (1946, 1948–1951) but never made it to the quarter finals stage. He reached the third round of the French Championships at Roland-Garros in 1937.