Juan Martín del Potro (Spanish pronunciation: [ˈxwan marˈtin del ˈpotɾo]) (born 23 September 1988) is an Argentine professional tennis player. As of 14 May 2012, he is ranked no. 9 by the Association of Tennis Professionals (ATP). Del Potro achieved a top-10 ranking by the ATP for the first time on October 6, 2008. In January 2010, he reached a career-high ranking of world no. 4. Soon after attaining this ranking, however, Del Potro had to withdraw from most of the tournaments in 2010 due to a wrist injury, and his ranking plummeted.

Having started playing tennis at the age of seven, Del Potro won his first senior match in 2004 at the age of 15. Del Potro became the youngest player to finish in the Top 100 in 2006, the youngest player in the top 50 in 2007, and youngest player in the top 10 in 2008. In 2008, he became the first player in ATP history to win his first four career titles in as many tournaments. He also completed the second-longest winning streak in 2008, and the second longest by a teenager in the Open Era, behind Rafael Nadal—with his winning sequence spanning 23 matches over five tournaments. Del Potro captured his first Grand Slam title at the 2009 US Open, defeating Nadal in the semifinal, and Roger Federer in the final, becoming the first man to beat both Federer and Nadal in the same Grand Slam tournament (later achieved by Novak Djokovic at the 2011 US Open). He became the second Argentine and the fifth-youngest man to win the US Open title in the Open Era. At 1.98m (6 ft, 6 in), he is the tallest player to have ever won a Grand Slam.

Milos Raonic ( /ˈmiːloʊʃ ˈraʊnɪtʃ/ MEE-lohsh ROW-nich;Serbian: Милош Раонић, Miloš Raonić [mîloʃ râonitɕ]; born December 27, 1990) is a Canadian professional tennis player who lives in Thornhill, Ontario, Canada.

Born in what is now Podgorica, Montenegro, Raonic moved to Canada with his family at the age of 3. He speaks his native Serbian and English. Raonic is Canada's highest ATP ranked male singles player since computer rankings began in 1973. He qualified for his first grand slam event at the 2010 U.S. Open. In 2011 he rose from World No. 152 to No. 37 in a month, after he reached the fourth round of the Australian Open and won his first ATP title at the 2011 SAP Open. Raonic, who prefers to play on hard courts, plays an all-court game but is most notable for his serve, which is powerful and accurate. Since late 2010 he has been coached by former Spanish pro player Galo Blanco in Barcelona.

Raonic's first ITF-sanctioned junior tennis event was the qualifying draw for the Canadian ITF Group 4 Championships in October 2003, where he lost in the first round to fellow Canadian Kirill Sinitsyn 6–7, 3–6. His next junior circuit action was a year later at the Canadian ITF Championships 1 event, where he lost in the first round of the main draw 4–6, 4–6 to compatriot Peter Marrack. In doubles at the same event he and partner Sheharyar Wali, also Canadian, reached the second round.

Bernard Tomic (Croatian: Bernard Tomić; born 21 October 1992) is an Australian professional tennis player. As of 24 October 2011, Tomic is the highest ranked Australian male tennis player and the youngest player in the top 219. The highlight of Tomic's career thus far has been a quarterfinal appearance at the 2011 Wimbledon Championships, which included a straight sets third round victory over the world Number 5 ranked player, Robin Söderling, before losing in four sets to eventual champion Novak Djokovic.

Tomic was born in Stuttgart, Germany, on 21 October 1992. Tomic's parents, John (Ivica) and Ady (Adisa), left Croatia, then a part of Yugoslavia, several years before his birth. In an interview, Tomic stated that his parents "have a Croatian background". Other sources, such The Australian and The Guardian, have written that Tomic's parents are also of Bosnian heritage. They were both working in Germany when Tomic was born. The family migrated to Queensland, Australia when Tomic was three years old. His younger sister, Sara, is a junior tennis player.

Nicolas Pierre Armand Mahut (French pronunciation: [nikɔla may]; born January 21, 1982 in Angers, Maine-et-Loire) is a French tennis player. Mahut is right-handed and has previously won the Orange Bowl in 1999, becoming professional in 2000. He is a good serve and volleyer and a doubles expert, having won many tournaments with his doubles partner Julien Benneteau. His career high was no. 40, achieved on February 18, 2008.

Mahut was runner-up to Andy Roddick at the 2007 Queen's Club Championships, having held a championship point in the second-set tiebreak. Mahut defeated both fifth seed Ivan Ljubičić and top seed Rafael Nadal in straight sets, as well as compatriot and future doubles partner Arnaud Clément, to reach the final.

Mahut holds a number of tennis records and awards for his performance in the longest match in professional tennis history against John Isner in the first round of the 2010 Wimbledon Championships, where he also broke the record of most points won in a single match (502); and, most games won by a losing player (91).

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.