The 1973 Rothmans Canadian Open was a tennis tournament played on outdoor clay courts at the Toronto Lawn Tennis Club in Toronto in Canada that was part of the 1973 Commercial Union Assurance Grand Prix and of the 1973 WTA Tour. The tournament was held from August 20 through August 26, 1973.
The 1973 Fred Perry Japan Open Tennis Championships was a combined men's and women's tennis tournament played on outdoor hard courts and took place in Tokyo, Japan. The tournament was held from 8 October through 14 October 1973. The men's events were part of the 1973 Commercial Union Assurance Grand Prix circuit and graded as B category whereas the women's competition was a non-tour event. Ken Rosewall won the men's singles title, earning him the $12,000 first prize, while Evonne Goolagong won the women's singles event and received $5,000.
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 1973 Dutch Open was a combined men's and women's tennis tournament staged in Hilversum, Netherlands. The men's event was part of the Grand Prix circuit and categorized in Group C. The tournament was played on outdoor clay courts and was held from 16 July to 23 July 1973. It was the 17th edition of the tournament. Tom Okker and Betty Stöve won the singles titles.
The 1976 Cincinnati Open was a men's tennis tournament played on outdoor hard courts at the Coney Island in Cincinnati, Ohio in the United States. It was the 76th edition of the tournament and was part of the Three Star category of the 1976 Commercial Union Assurance Grand Prix circuit. The tournament was held from July 12 through July 18, 1976. Second-seeded Roscoe Tanner won the singles title.
The 1976 Grand Prix German Open, also known by its sponsored name Holsten-Bier German Open. was a combined men's and women's tennis tournament played on outdoor red clay courts. It was the 68th edition of the event and was part of the 1976 Commercial Union Assurance Grand Prix circuit. It took place at the Am Rothenbaum in Hamburg, West Germany, from 17 May through 23 May 1976. Eddie Dibbs and Sue Barker won the singles titles.
The 1975 Swedish Open was a combined men's and women's tennis tournament played on outdoor clay courts held in Båstad, Sweden. It was classified as a Group B category tournament and was part of the 1975 Grand Prix circuit. It was the 28th edition of the tournament and was held from 7 July until 7 July 1975. Manuel Orantes and Sue Barker won the singles titles.
The 1975 Aryamehr Cup was a men's professional tennis tournament played on outdoor clay courts at the Imperial Country Club in Tehran in Iran. It was part of the 1975 Commercial Union Assurance Grand Prix as a Group AA category event. The tournament was held from 20 October through 26 October 1975. Eddie Dibbs won the singles title.
The 1972 Grand Prix German Open was a combined men's and women's tennis tournament played on outdoor red clay courts. It was the 64th edition of the event and was part of the 1972 Commercial Union Assurance Grand Prix circuit. It took place at the Am Rothenbaum in Hamburg, West Germany, from 5 June through 11 June 1972. Manuel Orantes and Helga Masthoff won the singles titles.
The 1971 Italian Open was a combined men's and women's tennis tournament that was played by men on outdoor clay courts at the Foro Italico in Rome, Italy. The men's tournament was part of the World Championship Tennis circuit while the women's tournament was a non-tour event, i.e. not part of the Grand Prix or Virginia Slims circuit. The tournament was held from 3 May through 10 May 1971. The singles titles were won by Rod Laver and Virginia Wade.
The 1971 Swedish Open was a combined men's and women's tennis tournament played on outdoor clay courts held in Båstad, Sweden. The event was classified as a Group C category tournament and was part of the 1971 Grand Prix circuit. It was the 24th edition of the tournament and was held from 5 July through 11 July 1971. Ilie Năstase and Helga Masthoff won the singles titles.
The 1971 Grand Prix German Open was a combined men's and women's tennis tournament played on outdoor red clay courts. It was the 63rd edition of the tournament. The event was part of the 1971 Pepsi-Cola Grand Prix circuit and categorized as a B Class tournament. It took place at the Am Rothenbaum in Hamburg, West Germany, from 17 May through 23 May 1971. Andrés Gimeno and Billie Jean King won the singles titles.
The 1974 Grand Prix German Open was a combined men's and women's tennis tournament played on outdoor red clay courts. It was the 66th edition of the event and was part of the 1974 Commercial Union Assurance Grand Prix circuit. It took place at the Am Rothenbaum in Hamburg, West Germany, from 20 May through 26 May 1974. Third-seeded Eddie Dibbs won the singles title.
The 1974 Italian Open was a combined men's and women's tennis tournament that was played by men on outdoor clay courts at the Foro Italico in Rome, Italy. The men's tournament was part of the 1974 Commercial Union Assurance Grand Prix circuit while the women's tournament was part of the Women's International Grand Prix circuit. The tournament was held from 26 May through 3 June 1974. The singles titles were won by third-seeded Björn Borg and first-seeded Chris Evert.
The 1976 Monte Carlo WCT was a combined men's and women's tennis tournament played on outdoor clay courts at the Monte Carlo Country Club in Roquebrune-Cap-Martin, France. The men's tournament was part of the World Championship Tennis (WCT) tour. It was the 71st edition of the event and was held from 13 April through 20 April 1976. Guillermo Vilas and Helga Masthoff won the singles titles.
The 1975 Grand Prix German Open was a combined men's and women's tennis tournament played on outdoor red clay courts. It was the 67th edition of the event and was part of the 1975 Commercial Union Assurance Grand Prix circuit. It took place at the Am Rothenbaum in Hamburg, West Germany, from 19 May through 25 May 1975. Manuel Orantes and Renáta Tomanová won the singles titles.
The 1969 German Open Championships was a combined men's and women's tennis tournament played on outdoor red clay courts. It was the 61st edition of the tournament, the second one in the Open Era, and the first edition to offer official prize money. The event took place at the Am Rothenbaum in Hamburg, West Germany, from 5 August through 11 August 1969. First-seeded Tony Roche and Judy Tegart won the singles titles. Tegart also won the doubles and mixed doubles titles.
The 1978 German Open was a combined men's and women's tennis tournament played on outdoor red clay courts. The men's tournament was part of the 1978 Colgate-Palmolive Grand Prix circuit, categorized as a four-star event, while the women's tournament was part of the Colgate Series and classified as an A category event. It was the 70th edition of the tournament and took place at the Am Rothenbaum in Hamburg, West Germany, from 15 May through 21 May 1978. Guillermo Vilas and Mima Jaušovec, both first-seeded, won the singles titles.
The 1970 German Open Championships was a combined men's and women's tennis tournament played on outdoor red clay courts. It was the 62nd edition of the tournament, the first one in the Open Era, and took place at the Am Rothenbaum in Hamburg, West Germany, from 10 August through 17 August 1970. First-seeded Tom Okker and Helga Schultze-Hösl won the singles titles.
The 1974 Melia Trophy, also known as the Madrid Open, was a combined men's and women's tennis tournament played on outdoor clay courts at the Real Sociedad Hípica Española Club de Campo in Madrid, Spain. The men's tournament was classified as Group A category and was part of the 1974 Grand Prix circuit. It was the third edition of the tournament and was held from 7 October until 13 October 1974. Ilie Năstase and Helga Masthoff won the singles titles.
Eddie Dibbs [1] 
Helga Masthoff 
