Michael Carl Bryan is an American former doubles world No. 1 tennis player. With his twin brother Bob, he was the world's top doubles player for more than nine years, first achieving the top ranking in September 2003. They became the second men's doubles team to complete the career Golden Slam by winning the 2012 London Olympics. Bryan holds the records for the most major men's doubles titles at 18, the most ATP Tour men's doubles titles (123), and the most weeks (506) ranked as the doubles world No. 1. He won all but five of his doubles titles with his brother; partnering Jack Sock, he won two majors and the year-end championship in 2018, as well as the 2018 ATP World Tour Fans' Favorite Doubles Team.

Robert "Bob" Charles Bryan is an American former doubles world No. 1 tennis player. He won 23 major titles: 16 in men's doubles and 7 in mixed doubles. He turned professional in 1998. With his twin brother Mike, he was the world No. 1 doubles player for several years, first achieving the top ranking in September 2003. The brothers were named the ATP Team of the Decade for 2000–2009. They became the second men's doubles team to complete the career Golden Slam at the 2012 London Olympics.