The 1975 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 Commercial Union Assurance Masters, Davis Cup Final and Nations Cup are included in this calendar but did not count towards the Grand Prix.

The men's schedule started in December 1974 with the Australian Open and continued in May 1975 following the conclusion of the rival 1975 World Championship Tennis circuit which ran from January to early May.

Schedule Key Triple Crown Grand Prix Masters Group AA events Group A events Group B events Team events

December 1974 WeekTournamentChampionsRunners-upSemifinalistsQuarterfinalists26 Dec Australian Open Melbourne, Australia Grand Slam Group B Grass – $50,000 – 32S/32D Singles – Doubles John Newcombe 7–5, 3–6, 6–4, 7–6(9–7) Jimmy Connors Dick Crealy Tony Roche Kim Warwick John Alexander Alex Metreveli Geoff Masters John Alexander Phil Dent 6–3, 7–6 Bob Carmichael Allan Stone

May WeekTournamentChampionsRunners-upSemifinalistsQuarterfinalists 5 May Bavarian Championships Munich, West Germany Group B Clay – $50,000 – 32S/16D Singles – Doubles Guillermo Vilas 2–6, 6–0, 6–2, 6–3 Karl Meiler Ulrich Pinner Ilie Năstase Harald Elschenbroich Pavel Hutka Jan Kodeš Hans-Jürgen Pohmann Wojciech Fibak Jan Kodeš 7–5, 6–3 Milan Holeček Karl Meiler 12 May Coca-Cola British Hard Court Championships Bournemouth, Great Britain Group B Clay – $50,000 – 48S/24D/16XD Manuel Orantes 6–3, 4–6, 6–2, 7–5 Onny Parun Guillermo Vilas Patrick Proisy Bernard Mitton Roger Taylor Jan Kodeš Ilie Năstase Juan Gisbert Sr. Manuel Orantes 8–6, 6–3 Syd Ball Dick Crealy Sharon Walsh David Lloyd 3–6, 8–6, 7–5 Lesley Charles Mark Farrell 19 May German Open Hamburg, West Germany Group AA Clay – $100,000 – 64S/32D Manuel Orantes 3–6, 6–2, 6–2, 4–6, 6–1 Jan Kodeš Paolo Bertolucci Ilie Năstase Guillermo Vilas Wojciech Fibak Onny Parun Roger Taylor Juan Gisbert Sr. Manuel Orantes 6–3, 7–6 Wojciech Fibak Jan Kodeš 26 May Italian Open Rome, Italy Group AA Clay – $100,000 – 64S/32D Raúl Ramírez 7–6, 7–5, 7–5 Manuel Orantes Ilie Năstase Guillermo Vilas Björn Borg Eddie Dibbs Harold Solomon Onny Parun Brian Gottfried Raúl Ramírez 6–4, 7–6, 2–6, 6–1 Jimmy Connors Ilie Năstase Agfacolor Cup Düsseldorf, West Germany Group B Clay – $50,000 – 32S/16D Jaime Fillol 6–4, 1–6, 6–0, 7–5 Jan Kodeš Colin Dibley François Jauffret Raymond Moore Harald Elschenbroich Hans Kary Toma Ovici François Jauffret Jan Kodeš 6–2, 6–3 Harald Elschenbroich Hans Kary

June WeekTournamentChampionsRunners-upSemifinalistsQuarterfinalists 3 Jun French Open Paris, France Grand Slam Triple Crown Clay – 128S/64D/32XD Singles – Doubles – Mixed doubles Björn Borg 6–2, 6–3, 6–4 Guillermo Vilas Adriano Panatta Eddie Dibbs Harold Solomon John Andrews Onny Parun Raúl Ramírez Brian Gottfried Raúl Ramírez 6–2, 2–6, 6–2, 6–4 John Alexander Phil Dent Fiorella Bonicelli Thomaz Koch 6–4, 7–6 Pam Teeguarden Jaime Fillol 17 Jun John Player Open Nottingham, Great Britain Group AA Grass – $100,000 – 64S/30D Tom Okker 6–1, 3–6, 6–3 Tony Roche Roscoe Tanner Phil Dent Jimmy Connors Arthur Ashe Bob Carmichael Guillermo Vilas Charlie Pasarell Roscoe Tanner 6–2, 6–3 Tom Okker Marty Riessen 24 Jun Wimbledon Championships London, Great Britain Grand Slam Triple Crown Grass – 128S/64D/64XD Singles – Doubles – Mixed doubles Arthur Ashe 6–1, 6–1, 5–7, 6–4 Jimmy Connors Roscoe Tanner Tony Roche Raúl Ramírez Guillermo Vilas Björn Borg Tom Okker Vitas Gerulaitis Sandy Mayer 7–5, 8–6, 6–4 Colin Dowdeswell Allan Stone Margaret Court Marty Riessen 6–4, 7–5 Betty Stöve Allan Stone

July WeekTournamentChampionsRunners-upSemifinalistsQuarterfinalists 7 Jul Swedish Open Båstad, Sweden Group B Clay – $50,000 – 32S/16D Manuel Orantes 6–0, 6–3 José Higueras Thomaz Koch Corrado Barazzutti Björn Borg Juan Gisbert Sr. Ismail El Shafei Patrick Proisy Ove Bengtson Björn Borg 7–6, 7–5 Juan Gisbert Sr. Manuel Orantes Swiss Open Gstaad, Switzerland Group B Clay – $50,000 – 32S/16D Singles – Doubles Ken Rosewall 6–4, 6–4, 6–3 Karl Meiler Jairo Velasco Guillermo Vilas Jeff Borowiak Iván Molina Marcelo Lara Nikola Pilić Jürgen Fassbender Hans-Jürgen Pohmann 6–4, 9–7, 6–1 Colin Dowdeswell Ken Rosewall Head Cup Kitzbühel, Austria Group B Clay – $50,000 – 32S/16D Adriano Panatta 2–6, 6–2, 7–5, 6–4 Jan Kodeš Ulrich Pinner Wojciech Fibak Hans Kary János Benyik Balázs Taróczy Jiří Hřebec Paolo Bertolucci Adriano Panatta 6–2, 6–2, 7–6 Patrice Dominguez François Jauffret 14 Jul Chicago International Chicago, United States Group B Carpet – $50,000 – 32S/16D Roscoe Tanner 6–1, 6–7, 7–6 John Alexander Dick Stockton Andrew Pattison Sashi Menon Brian Gottfried Sherwood Stewart Haroon Rahim John Alexander Phil Dent 6–3, 6–4 Mike Cahill John Whitlinger Dutch Open Hilversum, the Netherlands Group B Clay – $50,000 – 32S/15D Singles – Doubles Guillermo Vilas 6–4, 6–7, 6–2, 6–3 Željko Franulović Víctor Pecci Ulrich Pinner Jürgen Fassbender Ismail El Shafei Nikola Špear François Jauffret Wojciech Fibak Guillermo Vilas 6–4, 6–3 Željko Franulović John Lloyd 21 Jul Washington Star International Washington, United States Group AA Clay – $100,000 – 64S/32D Guillermo Vilas 6–1, 6–3 Harold Solomon Raúl Ramírez Cliff Richey Jaime Fillol Eddie Dibbs Ilie Năstase Arthur Ashe Bob Lutz Stan Smith 7–5, 2–6, 6–1 Brian Gottfried Raúl Ramírez 28 Jul First National Bank Classic Louisville, United States Group AA Clay – $100,000 – 64S/30D Guillermo Vilas 6–4, 6–3 Ilie Năstase Jaime Fillol Arthur Ashe Željko Franulović Manuel Orantes Raúl Ramírez John Alexander Not played. Fibak / Vilas A. Amritraj / V. Amritraj Western Championships Cincinnati, United States Group B Clay – $50,000 – 32S/16D Tom Gorman 7–5, 2–6, 6–4 Sherwood Stewart Byron Bertram Stan Smith Brian Teacher Cliff Drysdale Dick Crealy Robert Kreiss Phil Dent Cliff Drysdale 7–6, 6–4 Marcelo Lara Joaquín Loyo-Mayo

August WeekTournamentChampionsRunners-upSemifinalistsQuarterfinalists 4 Aug U.S. Clay Court Championships Indianapolis, United States Group AA Clay – $130,000 – 64S/32D Manuel Orantes 6–2, 6–2 Arthur Ashe Guillermo Vilas Onny Parun Eddie Dibbs Juan Gisbert Sr. Iván Molina Jaime Fillol Juan Gisbert Sr. Manuel Orantes 7–5, 6–0 Brian Gottfried Raúl Ramírez Volvo International North Conway, United States Group B Clay – $100,000 – 48S/20D Singles – Doubles Jimmy Connors 6–2, 6–2 Ken Rosewall Rod Laver Ilie Năstase Víctor Pecci Norman Holmes Raymond Moore John Alexander Haroon Rahim Erik van Dillen 7–6, 7–6 John Alexander Phil Dent 11 Aug Rothmans Canadian Open Toronto, Ontario, Canada Group AA Clay – $100,000 – 64S/32D Manuel Orantes 7–6, 6–0, 6–1 Ilie Năstase Phil Dent Juan Gisbert Sr. Wojciech Fibak John Alexander Adriano Panatta Hans-Joachim Plötz Cliff Drysdale Raymond Moore 6–4, 5–7, 7–6 Jan Kodeš Ilie Năstase City National Buckeye Championships Columbus, United States Group B $50,000 – Clay – 32S/16D Vijay Amritraj 6–4, 7–5 Bob Lutz Stan Smith Tom Gorman Jürgen Fassbender Bernard Mitton Jim Delaney Sherwood Stewart Bob Lutz Stan Smith 6–2, 6–7, 6–3 Jürgen Fassbender Hans-Jürgen Pohmann 18 Aug U.S. Professional Tennis Championships Boston, United States Group AA Clay – $100,000 – 64S/32D Singles – Doubles Björn Borg 6–3, 6–4, 6–2 Guillermo Vilas Arthur Ashe John Alexander Rod Laver Wojciech Fibak Manuel Orantes Raúl Ramírez Brian Gottfried Raúl Ramírez 4–6, 6–3, 7–6 John Andrews Mike Estep Tennis Week Open South Orange, United States Group B Clay – $50,000 – 32S/12D Ilie Năstase 7–6, 6–1 Bob Hewitt Vijay Amritraj Anand Amritraj Jimmy Connors Raymond Moore Victor Amaya Balázs Taróczy Jimmy Connors Ilie Năstase 6–2, 6–3 Dick Crealy John Lloyd 25 Aug US Open New York City, United States Grand Slam Triple Crown Clay – $166,810–128S/64D/32XD Singles – Doubles – Mixed doubles Manuel Orantes 6–4, 6–3, 6–3 Jimmy Connors Björn Borg Guillermo Vilas Andrew Pattison Eddie Dibbs Ilie Năstase Jaime Fillol Jimmy Connors Ilie Năstase 6–4, 7–6 Tom Okker Marty Riessen Rosemary Casals Dick Stockton 6–3, 7–6 Billie Jean King Fred Stolle

September WeekTournamentChampionsRunners-upSemifinalistsQuarterfinalists 15 Sep Pacific Southwest Open Los Angeles, United States Group AA Hard – $100,000 – 64S/32D Singles – Doubles Arthur Ashe 3–6, 7–5, 6–3 Roscoe Tanner Raúl Ramírez Harold Solomon Bob Lutz Marty Riessen Dick Stockton Allan Stone Anand Amritraj Vijay Amritraj 7–6(7–3), 4–6, 6–4 Cliff Drysdale Marty Riessen 22 Sep Fireman's Fund International San Francisco, United States Group AA Carpet (i) – $100,000 – 64S/32D Singles – Doubles Arthur Ashe 6–0, 7–6(7–4) Guillermo Vilas Jeff Borowiak Geoff Masters Bob Lutz Dick Stockton Cliff Drysdale Sandy Mayer Fred McNair Sherwood Stewart 6–2, 7–6(7–3) Allan Stone Kim Warwick 29 Sep Hawaii Open Maui, United States Group B Hard – $50,000 – 32S/20D Jimmy Connors 6–1, 6–0 Sandy Mayer Bernard Mitton Haroon Rahim Billy Martin Bob Lutz Jeff Borowiak Allan Stone Fred McNair Sherwood Stewart 3–6, 7–6, 6–3 Jeff Borowiak Haroon Rahim Nations Cup Kingston, Jamaica $100,000 – 8 countries 2–1 Commonwealth Caribbean

October WeekTournamentChampionsRunners-upSemifinalistsQuarterfinalists 6 Oct Trofeo Melia Madrid, Spain Group A Clay – $75,000 – 64S/32D Jan Kodeš 5–7, 2–6, 7–6, 6–2, 6–3 Adriano Panatta Björn Borg Jaime Fillol Guillermo Vilas Eddie Dibbs Ilie Năstase Manuel Orantes Jan Kodeš Ilie Năstase 7–6, 4–6, 9–7 Juan Gisbert Sr. Manuel Orantes South Pacific Championships Melbourne, Australia Group B Clay – $50,000 – 32S/16D Brian Gottfried 6–2, 7–6, 6–1 Harold Solomon Phil Dent Cliff Richey Geoff Masters Nick Saviano Ross Case Dick Crealy Ross Case Geoff Masters 6–4, 6–0 Brian Gottfried Raúl Ramírez 13 Oct Custom Credit Australian Indoor Championships Sydney, Australia Group AA Hard (i) – $100,000 – 48S/24D Stan Smith 7–6, 6–2 Bob Lutz Brian Gottfried Ross Case Sandy Mayer John Alexander Tom Gorman Geoff Masters Brian Gottfried Raúl Ramírez 6–4, 6–2 Ross Case Geoff Masters Trofeo Conde de Godó Barcelona, Spain Group A Clay – $75,000 – 64S/32D Singles – Doubles Björn Borg 1–6, 7–6, 6–3, 6–2 Adriano Panatta Guillermo Vilas Jaime Fillol Eddie Dibbs Jan Kodeš Ilie Năstase Manuel Orantes Björn Borg Guillermo Vilas 3–6, 6–4, 6–3 Wojciech Fibak Karl Meiler 20 Oct Aryamehr Cup Tehran, Iran Group AA Clay – $100,000 – 48S/24D Eddie Dibbs 1–6, 6–4, 7–5, 6–4 Iván Molina Guillermo Vilas Patrick Proisy Corrado Barazzutti Onny Parun Jairo Velasco Manuel Orantes Juan Gisbert Sr. Manuel Orantes 7–5, 6–7, 6–1, 6–4 Bob Hewitt Frew McMillan Hitachi-Datsun Tennis Classic Perth, Australia Group B Hard – $50,000 – 32S/16D Harold Solomon 6–2, 7–6, 7–5 Sandy Mayer Brian Gottfried Ross Case Cliff Richey Tony Roche Syd Ball Tom Gorman Brian Gottfried Raúl Ramírez 2–6, 6–4, 6–4, 6–0 Ross Case Geoff Masters 27 Oct Philta International Manila, the Philippines Group A Hard – $75,000 – 32S/16D Ross Case 6–3, 6–1 Corrado Barazzutti José Higueras Ken Rosewall Manuel Orantes John Newcombe Dick Crealy Hans-Jürgen Pohmann Ross Case Geoff Masters 6–1, 6–2 Syd Ball Kim Warwick Jean Becker Open Paris, France Group B Hard (i) – $50,000 – 32S/18D Singles – Doubles Tom Okker 6–3, 2–6, 6–3, 3–6, 6–4 Arthur Ashe Raymond Moore Ilie Năstase Roscoe Tanner Jaime Fillol Eddie Dibbs Onny Parun Wojciech Fibak Karl Meiler 6–4, 7–6 Ilie Năstase Tom Okker

November