Robert Charles "Bob" Bryan (born April 29, 1978) is an American male professional tennis player. With his twin brother Mike, he has been a World No. 1 doubles player for the last several years. He has won seventeen Grand Slam titles, 10 in men's doubles and seven in mixed doubles. He turned professional in 1998. The Bryan brothers were named ATP Team of the Decade for 2000–2009.
He finished the year as the number one ranked singles player in the nation in 1998 after winning the clay court nationals and reaching the finals of Kalamazoo. The brothers were back to back Kalamazoo doubles champions in 1995 and 1996 and won the US Open Junior doubles title in 1996.
He played for Stanford University in 1997 and 1998, where he helped the Cardinal win back-to-back NCAA team championships. In 1998, he won the "Triple Crown" by taking the NCAA singles, doubles (with his twin brother Mike), and team titles. He was the first man to accomplish this since Stanford's Alex O'Brien did it in 1992.