Viktor Troicki (pronounced /trɔːˈɪtskiː/, Serbian: [ʋîktor troǐtskiː], Serbian Cyrillic: Виктор Троицки; born 10 February 1986 in Belgrade) is a Serbian professional tennis player. He has Serb and Russian ethnic roots. His paternal grandparents emigrated from Tver and Rostov-on-Don to Serbia in 1917. His career-high ranking is no. 12, achieved on 6 June 2011. He won his first ATP singles title at the 2010 Kremlin Cup, beating Jo-Wilfried Tsonga in the second round and Marcos Baghdatis in the final. He also won an ATP doubles title with Christopher Kas at the 2010 PTT Thailand Open. However, his biggest achievement was winning the deciding rubber in Serbia's Davis Cup final against France in 2010.

Troicki started playing tennis at the age of 5. From 2003, he started playing Futures tournaments in Serbia; and in 2004, he won his first tennis tournament in Niš. He won his first Challenger Tournaments also in Belgrade, on 20 January 2005, beating Fabio Colangelo from Italy 6–2, 6–1.

He made his debut on ATP Tour in Tokyo, in October 2006. He passed the first round, beating Fernando Vicente from Spain 6–7, 6–4, 6–2, but lost in the second round to then-world no. 1 Roger Federer, in a tight match 7–6, 7–6.

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.

Rafael "Rafa" Nadal Parera (Catalan: [rəˈfɛɫ nəˈðaɫ pəˈɾeɾə]; Spanish: [rafaˈel naˈðal paˈɾeɾa]) (born 3 June 1986) is a Spanish professional tennis player and a former World No. 1. As of 28 May 2012 (2012 -05-28)^[update], he is ranked No. 2 by the Association of Tennis Professionals (ATP). He is widely regarded as one of the greatest players of all time; his success on clay has earned him the nickname "The King of Clay", and has prompted many experts to regard him as the greatest clay court player of all time.

Nadal has won ten Grand Slam singles titles, including a record six French Open titles (tied with Bjorn Borg), the 2008 Olympic gold medal in singles, a record 21 ATP World Tour Masters 1000 tournaments, and also was part of the Spain Davis Cup team that won the finals in 2004, 2008, 2009 and 2011. He completed the Career Grand Slam by winning the 2010 US Open, being the seventh player in history, and the youngest in the open era, to achieve it. He is the second male player to complete the Career Golden Slam (winner of the four grand slams and the Olympic Gold medal) after only Andre Agassi.

Sam Austin Querrey (born October 7, 1987) is a professional American tennis player from Thousand Oaks, California currently living in Las Vegas, Nevada. His current ATP rank is 71, with a career high rank of #17, achieved on January 31, 2011. His height allows him to play with a strong serve and forehand. Querrey holds the record for most consecutive service aces since the ATP began keeping records of those statistics, with 10 in a 2007 match against James Blake. His regular doubles partner is fellow American John Isner.

Many tennis experts, including Davis Cup Captain Patrick McEnroe, have touted Querrey as America's next great talent.^{[citation needed]}

Querrey turned down a scholarship offer from USC to turn pro. His father Mike Querrey recommended that his son try making it in tennis, as he often regretted his own decision to go to the University of Arizona rather than play baseball for the Detroit Tigers which had drafted him. Sam Querrey said that going pro was "one of the toughest decisions of my life."

Andrew "Andy" Murray (born 15 May 1987) is a Scottish professional tennis player, ranked No. 4 in the world, and was ranked No. 2 from 17 to 31 August 2009. Murray achieved a top-10 ranking by the Association of Tennis Professionals for the first time on 16 April 2007. He has been runner-up in three Grand Slam finals: the 2008 US Open, the 2010 Australian Open and the 2011 Australian Open, losing the first two to Roger Federer and the third to Novak Djokovic. In 2011, Murray became only the seventh player in the Open Era to reach the semi-finals of all four Grand Slam tournaments in one year.

Andy Murray was born to Will and Judy in Glasgow, Scotland. His maternal grandfather, Roy Erskine, was a professional footballer who played reserve team matches for Hibernian and in the Scottish Football League for Stirling Albion and Cowdenbeath. Murray's brother, Jamie, is also a professional tennis player, playing on the doubles circuit. Following the separation of his parents when he was nine years old, Andy and Jamie lived with their father. Murray later attended Dunblane High School. Murray is in a five-year relationship with Kim Sears, who is regularly seen attending his matches. The relationship ended briefly in 2009 before they reconciled a short time later in 2010.