Frank Moser is a German retired professional tennis player. He was a doubles specialist. As a career highlight he beat with partner Ivo Karlović the world's top-ranked doubles team, the Bryan brothers, at the 2011 US Open – Men's doubles. Moser won his only ATP World Tour title in San Jose in 2013.

The Bryan brothers, identical twin brothers Bob Bryan and Mike Bryan, are retired American professional doubles tennis players and the most successful duo of all time. They were born on April 29, 1978, with Mike being the elder by two minutes. The Bryans have won multiple Olympic medals, including the gold in 2012 and have won more professional games, matches, tournaments and Grand Slams than any other men's pairing. They held the World No. 1 doubles ranking jointly for 438 weeks, which is longer than anyone else in doubles history, and have also enjoyed that World No. 1 ranking together for a record 139 consecutive weeks. They have finished as the ATP year-end number 1 doubles team a record 10 times. Between 2005 and 2006, they set an Open Era record by competing in seven consecutive men's doubles Grand Slam finals.