Robert Charles "Bob" Bryan (born April 29, 1978) is an American male professional tennis player. He and his twin brother, Mike, are current world no. 1 doubles players and have spent over 380 weeks in this position. He has won twenty-three Grand Slam titles: 16 in men's doubles and 7 in mixed doubles. He turned professional in 1998. The brothers were named ATP Team of the Decade for 2000–2009.