Lukáš Dlouhý (born April 9, 1983 in Písek) is a professional Czech tennis player on the ATP Tour. A doubles specialist, Dlouhý reached a career-high ranking of World Number 5 on June 22, 2009.

Dlouhý has been part of two long-term doubles partnerships, first with countryman and coach Pavel Vízner and actively with Leander Paes. He has reached numerous grand slam finals with each. At the 2006 French Open, he reached the third round of the men's singles event and the semifinals of the men's doubles tournament with Vízner. In 2007, Dlouhý and Vízner reached two grand slam finals at the 2007 French Open and 2007 U.S. Open.

Leander Adrian Paes (Bengali: লিয়েন্ডার পেজ; born 17 June 1973) is an Indian professional tennis player who currently features in the doubles events in the ATP tour and the Davis Cup tournament. He is the sports ambassador of Haryana. Paes completed the career grand slam in men's doubles after winning the Australian Open in 2012. Having won seven doubles and six mixed doubles Grand Slam titles and finishing as runner up in numerous other Grand Slam finals, he is considered to be one of the greatest and most respected contemporary doubles and mixed doubles players in the world. He is among the most successful professional Indian tennis players and is also the former captain of the Indian Davis Cup team. He is the recipient of India's highest sporting honour, the Rajiv Gandhi Khel Ratna award, in 1996–1997; the Arjuna Award in 1990; and the Padma Shri award in 2001 for his outstanding contribution to tennis in India. Paes is the great-grandson of the Bengali poet Michael Madhusudan Dutt.

Ernests Gulbis (pronounced [ˈærnəsts ˈɡulbis], born August 30, 1988) is a Latvian professional tennis player. In 2008, Gulbis won his first ATP Tour doubles title at the U.S. Men's Clay Court Championships, teaming with Rainer Schüttler, and in 2010 won his first ATP Tour singles title in the Delray Beach, defeating Ivo Karlović in the final. He won his second in July, 2011, by defeating Mardy Fish in the final of the 2011 Farmers Classic tournament, held in Los Angeles. His career highlights also include a 4th round appearance at the 2007 US Open and a quarterfinal appearance at the 2008 French Open, as well as several other ATP World Tour semifinal appearances.

Gulbis' professional training in tennis began at the age of 12, when he was enrolled at the Niki Pilić Tennis Academy in Croatia. Beginning after Wimbledon 2011, Gulbis is being coached by Guillermo Cañas. Previously, he was coached by Hernán Gumy (who before that was Marat Safin's coach), but their partnership ended due to Gumy's schedule; during that time, Darren Cahill served as Gulbis' consultant for several tournaments. Before Gumy, Ernests was coached by Karl Heinz Wetter and subsequently Nikola Pilić, the former professional Croatian tennis player and Croatian and German Davis Cup captain.

Robert Charles "Bob" Bryan (born April 29, 1978) is an American male professional tennis player. With his twin brother Mike, he has spent over 200 weeks as a World No. 1 doubles player. He has won eighteen Grand Slam titles, 11 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.^{[citation needed]}

Both brothers started their professional careers playing World TeamTennis for teams like the Idaho Sneakers through the current season for the Kansas City Explorers.

Michael Carl "Mike" Bryan (born April 29, 1978) is an American professional tennis player. He stands 6 ft 3 in (1.91 m) tall, weighs 192 lbs and plays right-handed. He turned professional in 1998. With his twin brother Bob, he has been World No. 1 doubles player for the last several years.

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 NCAA doubles title with his twin brother Bob.

Both brothers started their professional careers playing World TeamTennis for teams like the Idaho Sneakers through the current season for the Kansas City Explorers.

Together with his twin brother Bob he has been very successful in doubles. They have won 68 doubles titles (winning their record-setting 62nd title at the 2010 Farmers Classic in Los Angeles) including 11 Grand Slam titles. In 2005, he and Bob made it to the finals of all the 4 Grand Slam tournaments, only the second time such a feat has been achieved in the Open era. The Bryan Brothers are currently ranked No.1 in the ATP. Due to their success, they have been nicknamed The Wonder Twins after a fictional comic book duo.