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.

Stanislas "The Manislas" Wawrinka (born 28 March 1985 in Lausanne) is a Swiss professional tennis player. He also holds German citizenship as his father is German. His career-high singles ranking is World No. 9, achieved on 9 June 2008. He considers clay his best surface and his backhand his best shot. He won the gold medal for Switzerland in the men's doubles event at the 2008 Summer Olympics in Beijing, partnering Roger Federer, by beating Swedish team Simon Aspelin/Thomas Johansson in the final. They were also honoured with the 2008 Swiss Team of the Year Award.

John McEnroe believes Wawrinka has one of the most powerful backhands he has ever seen and describes him as having "the best one-handed backhand in the game today".

Wawrinka stopped attending regular schooling at age 15 to focus full-time on tennis. However, he continued his schooling by distance education with the French organization CNED, which offered him greater flexibility.

Wawrinka started playing international junior events at age 14 and entered the satellite circuit the following year. He compiled an outstanding junior career, winning the 2003 French Open Junior championships and finishing as the no. 14 junior.

Grigor Dimitrov (Bulgarian: Григор Димитров; born May 16, 1991, in Haskovo) is a tennis player from Bulgaria. He achieved a career high ranking of World No. 52 on August 22, 2011. Dimitrov also enjoyed a very successful junior career, in which he held the World No. 1 ranking and won the boy's singles titles at the 2008 Wimbledon Championships and the 2008 US Open.

Grigor was born in Haskovo, Bulgaria as the only child of father Dimitar, a tennis coach and mother Maria, a sports teacher and former volleyball player. He first held a tennis racket, given to him by his mother at the age of three and when he was five he began to play daily. During his teenage years he lived in Paris, France while training at Patrick Mouratoglou's Tennis Academy. He speaks fluent Bulgarian and English and says his main interests are all sports, cars, computers and watches.

His first major junior coup was when, at aged 14 he claimed the U14 European title. In 2006 he won the Orange Bowl U16 boys singles and was later named the Eddie Herr International 2007 Rising Star.

Roger Federer (German pronunciation: [ˈfeːdəʁɐ]) (born 8 August 1981) is a Swiss professional tennis player who held the ATP No. 1 position for a record 237 consecutive weeks from 2 February 2004 to 18 August 2008. Federer has occupied the #1 ranking for 285 overall weeks, one week short of the record 286 weeks held by Pete Sampras. As of 28 May 2012, he is ranked World No. 3. Federer has won a men's record 16 Grand Slam singles titles. He is one of seven male players to capture the career Grand Slam and one of three (with Andre Agassi and Rafael Nadal) to do so on three different surfaces (clay, grass, and hard courts). He is the only male player in tennis history to have reached the title match of each Grand Slam tournament at least five times and also the final at each of the nine ATP Masters 1000 Tournaments. Many sports analysts, tennis critics, and former and current players consider Federer to be the greatest tennis player of all time.

Federer has appeared in an unprecedented 23 career Grand Slam tournament finals, including a men's record ten in a row, and appeared in 18 of 19 finals from the 2005 Wimbledon Championships through the 2010 Australian Open, the lone exception being the 2008 Australian Open. He holds the record of reaching the semifinals or better of 23 consecutive Grand Slam tournaments over five and a half years, from the 2004 Wimbledon Championships through the 2010 Australian Open. At the 2012 Australian Open, he reached a record 31st consecutive Grand Slam quarterfinal. During the course of his run at the 2012 French Open in Roland Garros, Federer eclipsed Jimmy Connors long standing record of 233 match wins in Grand Slam tournaments when he defeated Adrian Ungur in a second round match.

Kei Nishikori (錦織 圭, Nishikori Kei^?) (born 29 December 1989 in Matsue, Shimane, Japan) is a Japanese tennis player, currently ranked World No. 17 as of April 2, 2012. He began playing tennis at the age of five and qualified for his first ATP main draw event at the Countrywide Classic in Los Angeles, California at the age of 17.^{[citation needed]}

Nishikori won the 2004 title at the Riad 21 Tournament in Rabat, Morocco and was a quarterfinalist at the 2006 Junior French Open. He partnered with Emiliano Massa to win the 2006 Junior French Open. Nishikori won the 2007 Luxilon Cup held at the 2007 Sony Ericsson Open by defeating Michael McClune.

Nishikori qualified and won the title at the ITF Futures event in Mazatlán, Mexico. He began the year by receiving a wildcard to the Kyoto Challenger in Kyoto, Japan.

A finalist in two USTA Pro Circuit events, Nishikori lost to Donald Young in Little Rock, Arkansas and Alex Bogomolov, Jr. in Carson, California. He partnered with Donald Young to win the doubles title at Little Rock. He paired with triple-French Open champion Gustavo Kuerten at the Sony Ericsson Open in Miami, Florida, where they lost in the first round. Nishikori served as a hitting partner for Roger Federer at Wimbledon.