Ivan Ljubičić (pronounced [ǐv̞an ʎûbitʃitɕ]; born March 19, 1979) is a retired Croatian tennis player. His career-high ATP ranking was no. 3.

Tall and powerfully built, he was noted for his strong serve. He achieved his best results in indoor tournaments played on carpet or hardcourt. Mostly a baseliner, he approached the net selectively (Ljubičić was a good volleyer and plays doubles occasionally). On his backhand, he used a slice or a drop-shot to great effect to draw a player or put him out of position. Relying heavily on his serve, he held well but was a comparatively weak returner, producing many sets ending in tie-breaks. Ljubičić used the Head Youtek Extreme Pro Racquet, after using the Babolat Pure Drive for most of his professional career.

Ljubičić previously served as the ATP Player Council president and strongly voiced his opinion on many issues, such as the possible downgrading of current Masters Series tournaments in Monte Carlo and Hamburg.^{[citation needed]}

Ljubičić and Mario Ančić are only the second doubles team ever to defeat Bob and Mike Bryan in Davis Cup history, the other team being France's Arnaud Clément and Michaël Llodra. Ljubičić helped Croatia win the 2005 Davis Cup, where they triumphed over the Slovakian Davis Cup team in the final.

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.

Novak Djokovic (Serbian: Новак Ђоковић or Novak Đoković; pronounced [nɔ̂ʋaːk dʑɔ̂ːkɔʋitɕ] ( listen); born 22 May 1987) is a Serbian professional tennis player who has been ranked World No. 1 by the Association of Tennis Professionals (ATP) since 4 July 2011. He has won five Grand Slam singles titles: the 2008, 2011 and 2012 Australian Open, the 2011 Wimbledon Championships, and the 2011 US Open. By winning three Majors in 2011, Djokovic became the sixth male player in the open era to win three Majors in a calendar year.

He is the first male player representing Serbia to win a Major singles title and the youngest player in the open era to have reached the semifinals of all four Grand Slam events, separately and consecutively. Amongst other titles, he won the Tennis Masters Cup in 2008 and was on the team which won the 2010 Davis Cup. He also won the bronze medal in singles at the Beijing Olympics in 2008. He has won 11 Masters 1000 series titles placing him joint fourth on the all time list. Djokovic has quickly moved up in the rankings of history. Tennis Channel ranked him number 40 , and former player Pat Cash said he is one of the greatest ever.