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.

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.

Jo-Wilfried Tsonga (French pronunciation: [(d)ʒo vilfʁid t͡sɔŋɡa]; born (1985-04-17)April 17, 1985) is a French professional tennis player. He was born in Le Mans, to a French mother, Évelyne, and a Congolese father, Didier, who moved to France in the 1970s to play handball. Tsonga is a member of the Tennis Club de Paris (TCP). His current career-high singles ranking is World No. 5, which he achieved on February 27, 2012.

Tsonga rose to fame by virtue of his performance in the 2008 Australian Open when, as an unseeded player, he reached the final, having defeated four seeded players along the way, including earning a straight sets win over the then world number two Rafael Nadal in the semifinals. Tsonga eventually lost to the then world no. 3 Novak Djokovic in the final in four sets, after winning the first set, the only set Djokovic dropped during the tournament.

Tsonga followed this up by winning his first ATP Masters Series championship at the 2008 Paris Masters, thus qualifying for the 2008 Tennis Masters Cup in Shanghai, China. His best performances in a major tournament since 2008 are semifinal appearances in the 2010 Australian Open and 2011 Wimbledon Championships. He also reached the final of the 2011 ATP World Tour Finals where he lost to five-time and defending champion Roger Federer.

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.

Peter Polansky (born June 15, 1988) is a Canadian professional tennis player. He is now Canada's seventh-ranked singles performer, according to the ATP; he was however the country's top singles player from June 21, 2010 until January 17, 2011. Previously he was also Canada's No. 2 from August 4, 2008 until June 21, 2010 (with the exception of one week).

Polansky played Canada F3, F4, and F5 Futures events in June 2004, compiling a win-lose record of 1-4. He next competed in a tour event as a wild-card in the 2005 Granby Challenger event, losing handily in the first round. He then played Canada F1, F2, and F3, in the late autumn, this time earning a 3-3 record and an ATP singles ranking of No. 1432. He also reached the final of the doubles for Canada F3, partnering compatriot Adil Shamasdin.

Polansky went 4-3 for Canada F1, F2, and F3 in 2006, this time played in March, and saw his ranking crack the top 1000. Losing again in the first round at Granby, he also received a wild-card for his first full-fledge ATP tourney, a Masters event at that, as he lost in the first round 6-7(3), 3-6 to compatriot Frank Dancevic at the 2006 Rogers Cup. Polansky then, as an unseeded Special Entry, proceeded to reach the finals of the U.S. Open boys singles tournament. His run included three-set wins over top seed Martin Kližan in the second round and No. 4 seed Donald Young in the semis. He lost the final 3-6, 6-7(4) to No. 10 seed Dušan Lojda. Polansky then in late September reached the semi-finals of U.S.A. F25. He lost again however in the first round of a Canadian challenger, this time Rimouski in October. He finished the year ranked World No. 821.