Gilles Müller (born May 9, 1983) is a Luxembourgish professional tennis player. He was a US Open junior champion and is the most successful male tennis player in the history of his country. He was born and raised in Schifflange and he resides in Leudelange. His career-high ATP singles ranking is World No. 42.

In 2001, the year Müller turned pro, he reached the final of the boys' singles at the 2001 Wimbledon Championships, but was defeated by Swiss Roman Valent, 3–6, 7–5, 6–3. Later that year, Müller won the boys' singles final at the 2001 US Open by defeating Taiwanese Yeu-Tzuoo Wang, 7–6, 6–2. Müller finished the year 2001 as the World No. 1 junior.

Remarkable results against top players were Müller's victories over Andre Agassi in the semifinals of the 2004 Legg Mason Tennis Classic in Washington, D.C., over Rafael Nadal in the second round of 2005 Wimbledon, and over Andy Roddick in the first round of the 2005 US Open.

At the 2008 US Open Gilles Müller, then ranked 130, had to go through the qualification tournament. He reached the main draw, where he consecutively beat Laurent Recouderc, former No. 2 Tommy Haas, Nicolás Almagro, and fifth-seeded Nikolay Davydenko, advancing to the quarter-finals of a Grand Slam tournament for the first time in his career. He had not been sure that he would even qualify, and so he had not even booked a hotel room for the tournament. He then lost to defending champion and eventual winner Roger Federer, 6–7, 4–6, 6–7.

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.

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.