The ITF Grand Prix Circuit was a professional tennis tour for male players that existed founded in 1970 as the ILTF Grand Prix Tennis Circuit it ran annually until 1989 when it and WCT Circuit were replaced by a single world wide ATP Tour.
The Nottingham Open, originally known as the Nottingham Championships or Nottingham Lawn Tennis Tournament (1887–1967), is a tennis tournament for men and women held in Nottingham, United Kingdom, played on outdoor grass courts at the Nottingham Tennis Centre. After being discontinued in 2008, it was downgraded in 2011 to ATP Challenger Tour and ITF Women's Circuit. briefly re-established as an ATP World Tour 250 event on the men's tour in 2015 and 2016, before returning to a Challenger event in 2017, and since 2015 it has been an international event on the women's tour. The tournament is held in June as a "warm-up" for Wimbledon.
The Australian Indoor Tennis Championship, also known as the Australian Indoor Championship, the Australian Indoor Open and the Sydney Indoor for short, was a professional men's tennis tournament was played in Sydney, Australia. The tournament was an initiative from John Newcombe and was part of an expanding Asian-Australian fall Grand Prix circuit. The event was played under various names as part of the Grand Prix tennis circuit from 1973 through 1989 and as part of the ATP Tour from 1990 through 1994. It was played on indoor hard courts at the Hordern Pavilion on the Sydney Showground through 1982 and at the Sydney Entertainment Centre beginning in 1983. The tournament was cancelled in June 1994 on financial grounds with tournament director and co-founder Graham Lovett citing insufficient television coverage and the difficulty of signing top players as the main reasons.
The Grand Prix Cleveland was a men's tennis tournament played in Cleveland, Ohio, in the United States. The event was part of the World Championship Tennis in 1972 and 1973. The 1976 edition was part of the USLTA-IPA Indoor Circuit. It was part of the Grand Prix circuit from 1978 through 1982 and in 1984 and 1985. It was played on outdoor hard courts. It was titled the Cleveland Tennis Classic in 1972 and 1973, the National Tennis Foundation Open in 1976 International Open in 1978; the Gray International in 1979; the Western Open in 1980 and 1981; the Fazio's Tennis Classic/95th Western Tennis Championships in 1982; the Society Bank Western Open Tennis Championships in 1984; and the Society Bank Tennis Classic in 1985. It was a Challenger-level tournament in 1983.
The Washington Indoor was a men's tennis tournament played in Washington D.C., except for the 1973 edition which was held in Merrifield, Virginia and the 1974–75 editions which were held in Landover, Maryland. The inaugural edition was part of the USLTA Indoor and Grand Prix circuits. It was played as part of the World Championship Tennis (WCT) circuit from 1973 until 1976 and the Grand Prix circuit from 1977 until 1980. The event was played on indoor carpet courts. Brian Gottfried was the only multiple singles champion, winning the title in 1977 and 1978.
The 1972 World Championship Tennis circuit was one of the two rival professional male tennis circuits of 1972. It was organized by World Championship Tennis (WCT). The circuit included twenty-three regular events, and two circuit finals, one taking place in May, counting for the second half of the 1971 season, and the first part of the 1972 season, and a smaller one taking place in November, counting for the second half of the 1972 season, from July through November.
The U.S. Professional Indoor Championships, also known as U.S. Pro Indoor, was a professional tennis tournament founded in 1962 as the Philadelphia Invitational Indoor Tennis Championships. The tournament was held in Philadelphia, United States from 1962 to 1998. It played on indoor carpet courts, and indoor hard courts. It was part of the ILTF World Circuit from 1962 to 1967 and again in 1970, the World Championship Tennis (WCT) circuit in 1968, 1969 and from 1971 to 1977 and the Grand Prix Tour from 1978 to 1989 before being held on the ATP Tour. It was held annually first at the Spectrum, and then at the CoreStates Center. It was originally named the Philadelphia Indoor Open Tournament prior to the open era.
The Brussels Indoor is a defunct professional tennis tournament played on indoor carpet courts at Forest National in Brussels. It was part of the Grand Prix tennis circuit initially and later, for three years, the ATP Championship Series of the ATP Tour. The tournament was established in 1980, becoming the second tournament to be played in Brussels, along with the ATP Brussels Outdoor. The following year the outdoor tournament was played for the last time, leaving the Donnay Indoor Championships as the sole professional tournament in the region.
The 1980 Volvo Grand Prix was a men's professional tennis circuit held that year. It incorporated the four grand slam tournaments, the Grand Prix tournaments. The Grand Prix circuit is a precursor to the ATP Tour.
The 1979 Colgate-Palmolive Grand Prix was a professional tennis circuit held that year. It consisted of four Grand Slam tournaments, the Grand Prix tournaments and the Nations Cup, a team event.
The 1973 World Championship Tennis circuit was one of the two rival professional male tennis circuits of 1973. It was organized by World Championship Tennis (WCT). In April 1972 WCT signed an agreement with the International Lawn Tennis Federation (ILTF) as a result of which the 1973 men's tennis season was divided in a WCT section, which ran from January until May, and a Grand Prix circuit which was held from May onward. The WCT circuit divided the players into two groups of 32 players, with each group playing 11 tournaments of the 22 tournaments. The four highest ranked players from each group qualified for the season finals in Dallas. The total available prize money was almost $1,250,000.
The 1978 Colgate-Palmolive Grand Prix was a professional tennis circuit held that year. It consisted of four Grand Slam tournaments, the Grand Prix tournaments and the Nations Cup, a team event. In addition eight World Championship Tennis (WCT) tournaments, a separate professional tennis circuit held from 1971 through 1977, were incorporated into the Grand Prix circuit. The 28 tournaments with prize money of $175,000 or more formed the Super Series category. Jimmy Connors won 10 of the 84 tournaments which secured him the first place in the Grand Prix points ranking. However he did not play enough tournaments (13) to qualify for largest share ($300,000) of the bonus pool, which instead went to third–ranked Eddie Dibbs.
The 1974 Commercial Union Assurance Grand Prix was a professional tennis circuit administered by the International Lawn Tennis Federation (ILTF) which served as a forerunner to the current Association of Tennis Professionals (ATP) World Tour and the Women's Tennis Association (WTA) Tour. The circuit consisted of the four modern Grand Slam tournaments and open tournaments recognised by the ILTF. The season-ending Commercial Union Assurance Masters and Davis Cup Final are included in this calendar but did not count towards the Grand Prix ranking.
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.
The 1973 USLTA Indoor Circuit was a professional tennis circuit held in the United States from January until March that year. It consisted of 13 tournaments and was organized by Bill Riordan and sanctioned by the United States Lawn Tennis Association (USLTA).
The 1980 Birmingham Open was a men's tennis tournament played on indoor carpet courts. It was the eighth and last edition of the Grand Prix Birmingham, and part of the 1980 Volvo Grand Prix circuit. It took place in Birmingham, Alabama, United States from January 14 through January 20, 1980. First-seeded Jimmy Connors won the singles title, his sixth at the event.
The 1972 U.S. National Indoor Tennis Championships was a men's tennis tournament held at the Wicomico Youth and Civic Center in Salisbury, Maryland in the United States. The event was part of the 1972 USLTA Indoor Circuit and was also a Grade B event on the 1972 Grand Prix Circuit. It was the second edition of the tournament and was held from February 13 through February 20, 1972, and played on indoor hard courts. First-seeded national Stan Smith won the singles title and $9,000 first-prize money as well as 50 Grand Prix ranking points. It was his second singles title at the event after 1969.
The 1980 Hortico Melbourne Indoor Championships was an Association of Tennis Professionals men's tournament played on indoor carpet courts in the Frankston suburb of Melbourne, Victoria, Australia. It was the inaugural edition of the tournament, which was part of the 1980 Grand Prix tennis circuit, and was held from 20 October until 26 October 1980. First-seeded Vitas Gerulaitis won the singles title.
The 1979 U.S. National Indoor Championships was a men's tennis tournament played on indoor carpet courts at the Racquet Club of Memphis in Memphis, Tennessee in the United States. The event was part of the 1979 Colgate-Palmolive Grand Prix circuit. It was the tenth edition of the tournament in the open era and was held from February 26 through March 4, 1979. First-seeded Jimmy Connors won the singles title and $40,000 first-prize money. It was his fifth singles title at the event after 1973–75 and 1978 which equaled the tournament record set by Wylie C. Grant.
The 1972 National Indoor Championships, also known as the Hampton Indoor, was a men's tennis tournament played on indoor carpet courts at the Hampton Roads Coliseum in Hampton, Virginia in the United States that was part of Group C of the 1972 Grand Prix circuit as well as of the 1972 USLTA Indoor Circuit. It was the third edition of the tournament and was held from February 28 through March 5, 1972. First-seeded Stan Smith won the singles title and earned $9,000 first-prize money.
Sandy Mayer 
Björn Borg 
Pat Cramer 
Jürgen Fassbender 
Ion Țiriac 
Ian Fletcher 
Nicholas Kalogeropoulos 
Iván Molina 
Colin Dowdeswell 
Wojciech Fibak 
Tom Okker 
José Luis Clerc