Heinz Peter Günthardt (born February 8, 1959 in Zürich) is a former tennis player from Switzerland, who won five singles titles during his professional career, including the Rotterdam WCT in 1980.

In doubles Günthardt captured a total number of thirty titles. The right-hander reached his highest singles ATP-ranking on April 7, 1986, when he became the World No. 22. Günthardt won the men's doubles at the 1985 Wimbledon Championships, and the mixed doubles at the 1985 US Open partnering Martina Navrátilová. He was also a member of the Swiss team at the 1988 Olympic Games.

He was the coach of all-time great Steffi Graf, from the start of 1992 until the end of Graf's tennis playing career in July 1999, and he has also worked briefly with Jelena Dokić. From February to November 2010 he worked with former WTA No. 1 Ana Ivanović.

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Stefanie Maria "Steffi" Graf (born 14 June 1969, in Mannheim, Baden-Württemberg, West Germany) is a former World No. 1 German tennis player.

In total, Graf won 22 Grand Slam singles titles, second among male and female players only to Margaret Court's 24. In 1988, she became the first and only tennis player (male or female) to achieve the Calendar Year Golden Slam by winning all four Grand Slam singles titles and the Olympic gold medal in the same calendar year.

Graf was ranked World No. 1 by the Women's Tennis Association (WTA) for a record 377 total weeks—the longest period for which any player, male or female, has held the number-one ranking since the WTA and the Association of Tennis Professionals began issuing rankings. She also holds the open era record for finishing as the year-end World No. 1 the most times, having done so on eight occasions. She won 107 singles titles, which ranks her third on the WTA's all-time list after Martina Navratilova (167 titles) and Chris Evert (154 titles).

Amélie Simone Mauresmo French pronunciation: [ameli simɔn moʁɛsmo]; (born 5 July 1979) is a French former professional tennis player, and a former World No. 1. Mauresmo won two Grand Slam singles titles at the Australian Open and at Wimbledon.

Mauresmo first attained the top ranking on 13 September 2004, holding it for five weeks on that occasion. She was the fifteenth world no. 1 in women's tennis since the computer rankings began. She is well known for her powerful one-handed backhand and strong net play. She officially announced her retirement from professional tennis on 3 December 2009, ending a career of ten years. She returned to Wimbledon in 2010, acting as a grass court advisor for Frenchman and 2007 Wimbledon doubles champion Michaël Llodra.

Mauresmo was born in Saint-Germain-en-Laye. She began playing tennis at the age of four, after being inspired by Yannick Noah's win in the 1983 French Open on television. It was after his win that her parents bought her her first tennis racket. Later on in 1998 Yannick Noah picked her on the French team for the Fed Cup. Her mother, Françoise is a homemaker and her father Francis, who died in March 2004, was an engineer. She also has a brother Fabien who is an engineer.

Ana Ivanovic (Serbian Cyrillic: Ана Ивановић, Ana Ivanović; Serbian pronunciation: [âna iʋǎːnoʋitɕ] ( listen)) (born November 6, 1987, in Belgrade, SR Serbia, SFR Yugoslavia) is a former world no. 1 Serbian tennis player. As of May 28, 2012, she is ranked 14th on the Women's Tennis Association (WTA) rankings. She beat Dinara Safina to win the 2008 French Open and was the runner-up in singles at the 2007 French Open and the 2008 Australian Open. Competing as a professional since 2003, she has won 11 WTA Tour singles titles. When on form, Ivanovic is known for her aggressive style of play.

Ivanovic's mother Dragana (Драгана), a lawyer, supports her daughter during most of her matches. Her father Miroslav (Мирослав), a self-employed businessman, attends as many events as he possibly can. Ana has a younger brother, Miloš (Милош), with whom she loves to play basketball.

Aside from her tennis career, Ivanovic also studies finance at a university in Belgrade and Spanish in her spare time. Her inspiration to begin playing was Monica Seles, who at that time played for Yugoslavia.

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.