Tennis is a racket sport that is played either individually against a single opponent (singles) or between two teams of two players each (doubles). Each player uses a tennis racket that is strung with cord to strike a hollow rubber ball covered with felt over or around a net and into the opponent's court. The object of the game is to manoeuvre the ball in such a way that the opponent is not able to play a valid return. The player who is unable to return the ball validly will not gain a point, while the opposite player will.
The Grand Slam in tennis is the achievement of winning all four major championships in one discipline in the same calendar year, also referred to as the "Calendar-year Grand Slam" or "Calendar Slam". In doubles, a team may accomplish the Grand Slam playing together or a player may achieve it with different partners. Winning all four major championships consecutively but not within the same calendar year is referred to as a "non-calendar-year Grand Slam", while winning the four majors at any point during the course of a career is known as a "Career Grand Slam".
Wheelchair tennis is one of the forms of tennis adapted for wheelchair users. The size of the court, net height and rackets are the same, but there are two major differences from pedestrian tennis: athletes use specially designed wheelchairs, and the ball may bounce up to two times, where the second bounce may also occur outside the court.
The International Tennis Federation (ITF) is the governing body of world tennis, wheelchair tennis, and beach tennis. It was founded in 1913 as the International Lawn Tennis Federation by twelve national tennis associations. As of 2016, there are 211 national and six regional associations that make up ITF's membership.
The Association of Tennis Professionals (ATP) is the governing body of the men's professional tennis circuits – the ATP Tour, the ATP Challenger Tour and the ATP Champions Tour.
The WTA Tour is a worldwide top-tier tennis tour for women organized by the Women's Tennis Association. The second-tier tour is the WTA 125K series, and third-tier is the ITF Women's Circuit. The men's equivalent is the ATP Tour.
The Grand Slam Cup was a tennis tournament held annually at the Olympiahalle in Munich, Germany from 1990 through 1999. The event was organized by the International Tennis Federation (ITF), which invited the best-performing players in the year's Grand Slam events to compete in the Grand Slam Cup.
The ATP Tour is a worldwide top-tier tennis tour for men organized by the Association of Tennis Professionals. The second-tier tour is the ATP Challenger Tour and the third-tier is the ITF Men's World Tennis Tour. The equivalent women's organisation is the WTA Tour.
The ITF World Tennis Tour is a series of professional tennis tournaments held around the world that are organized by the International Tennis Federation. The tour represents the lowest rung of the men's professional tennis ladder. ITF tournaments are incorporated into the ATP rankings, enabling young professionals to progress on to the ATP Challenger Tour and ultimately the full ATP Tour. Nearly every professional player has spent some time on the ITF Men's World Tennis Tour.
The Rijeka Open is a professional tennis tournament played on outdoor red clay courts. It is currently part of the Association of Tennis Professionals (ATP) Challenger Tour. It is held annually in Rijeka, Croatia, since 2007.
The ITF Junior Circuit is the premier level for worldwide competition among under-18 junior tennis players. Founded in 1977 with only nine tournaments, the 2011 ITF Junior Circuit offered over 350 tournaments in 118 countries. Mirroring the ATP and WTA circuits, the ITF Junior Circuit ranks players and crowns a year end world champion.
The ITF Women's World Tennis Tour, previously known as the ITF Women's Circuit, is a series of professional tennis tournaments run by the International Tennis Federation for female professional tennis players.
The Open Era is the current era of professional tennis. It began in 1968 when the Grand Slam tournaments allowed professional players to compete with amateurs, ending the division that had persisted since the dawn of the sport in the 19th century. The first open tournament was the 1968 British Hard Court Championships held in April, followed by the inaugural open Grand Slam tournament, the 1968 French Open, a month later. Unless otherwise sourced, all records are based on data from the Association of Tennis Professionals (ATP), the International Tennis Federation (ITF), and the official websites of the four Grand Slam tournaments. All rankings-related records are based on ATP rankings, which began in 1973. The names of active players appear in boldface.
Makoto Ninomiya is a Japanese professional tennis player.
The 2015 WTA Tour was the elite professional tennis circuit organised by the Women's Tennis Association (WTA) for the 2015 tennis season. The 2015 WTA Tour calendar comprises the Grand Slam tournaments (supervised by the International Tennis Federation, the WTA Premier tournaments, the WTA International tournaments, the Fed Cup, and the year-end championships. Also included in the 2015 calendar is the Hopman Cup, which is organized by the ITF and does not distribute ranking points.
The 2016 International Tennis Federation (ITF) Women's Circuit is a second-tier tour for women's professional tennis. It is organized by the International Tennis Federation and is a tier below the Women's Tennis Association (WTA) Tour. The ITF Women's Circuit includes tournaments with prize money ranging from $10,000 to $100,000.
A carpet court is a type of tennis court. The International Tennis Federation describes the surface as a "textile or polymeric material supplied in rolls or sheets of finished product." It is one of the fastest court types, second only to grass courts. The use of carpet courts in ATP Tour competitions ended in 2009. In women's tennis, no WTA Tour tournaments have used carpet courts since the last edition of the Tournoi de Québec in 2018. ATP Challenger and ITF circuit level tournaments with carpet courts continue to exist up to the present (2022).
The 2020 International Tennis Federation (ITF) Women's World Tennis Tour is a second-tier tour for women's professional tennis. It is organized by the International Tennis Federation and is a tier below the Women's Tennis Association (WTA) Tour. The ITF Women's World Tennis Tour includes tournaments with prize money ranging from $15,000 to $100,000. The ITF Women's World Tennis Tour is the product of reforms designed to support talented junior players in their progression to the senior game, and target the prize money effectively at professional tournaments to enable more players to make a living.
The 2022 WTA Tour is the global elite women's professional tennis circuit organized by the Women's Tennis Association (WTA) for the 2022 tennis season. The 2022 WTA Tour calendar comprises the Grand Slam tournaments, the WTA 1000 tournaments, the WTA 500 tournaments, the WTA 250 tournaments, the Billie Jean King Cup, and the year-end championships.
The 2022 International Tennis Federation (ITF) Women's World Tennis Tour is the entry-level and mid-level tour for women's professional tennis. It is organized by the International Tennis Federation and is a tier below the Women's Tennis Association (WTA) Tour. The ITF Women's World Tennis Tour provides a professional pathway between the ITF Junior World Tennis Tour and the WTA Tour. The results of ITF tournaments are incorporated into the WTA ranking, which enables professionals to progress through to the elite levels of women's professional tennis. The ITF Women's World Tennis Tour offers approximately 500 tournaments across 65 countries and incorporates five prize money levels of tournaments: $15,000, $25,000, $60,000, $80,000 and $100,000
Petra Rampre 
Tetiana Luzhanska 
Jamie Hampton 
Michaëlla Krajicek 
Rebecca Marino 
Anna Tatishvili 
Chan Chin-wei 
Varvara Lepchenko 
Kelly Liggan 
Maria Fernanda Alves 
Natalie Grandin 
Youlia Fedossova 
Melinda Czink 
Līga Dekmeijere 
İpek Şenoğlu