The 1973 Commercial Union Assurance Grand Prix was a 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. Bonus points were awarded to players who were nominated to play in certain 1973 Davis Cup ties and who missed tournaments through competing in those ties. The Commercial Union Assurance Masters is included in this calendar but did not count towards the Grand Prix.

Schedule

Key AA events Grand Prix Masters A events B events C events Team events

December 1972 WeekTournamentChampionsRunners-upSemifinalistsQuarterfinalists26 Dec Australian Open Melbourne, Australia Grand Slam – Group A Grass – $27,450 – 56S/32D Singles – Doubles John Newcombe 6–3, 6–7, 7–5, 6–1 Onny Parun Karl Meiler Patrick Proisy Wanaro N'Godrella Alex Metreveli John Cooper Bob Carmichael Mal Anderson John Newcombe 6–3, 6–4, 7–6 John Alexander Phil Dent

May WeekTournamentChampionsRunners-upSemifinalistsQuarterfinalists 7 May Rothmans British Hard Court Championships Bournemouth, Great Britain Group B Clay – 64S/32D/32XD Adriano Panatta 6–8, 7–5, 6–3, 8–6 Ilie Năstase Barry Phillips-Moore Ross Case Geoff Masters Buster Mottram François Jauffret Patrice Dominguez Juan Gisbert Sr. Ilie Năstase 6–4, 8–6 Adriano Panatta Ion Țiriac Virginia Wade Frew McMillan 6–2, 6–3 Ilana Kloss Bernard Mitton 21 May French Open Paris, France Grand Slam – Group AA Clay – 128S/64D/32XD Singles – Doubles – Mixed doubles Ilie Năstase 6–3, 6–3, 6–0 Nikola Pilić Adriano Panatta Tom Gorman Tom Okker Paolo Bertolucci Jan Kodeš Roger Taylor John Newcombe Tom Okker 6–1, 3–6, 6–3, 5–7, 6–4 Jimmy Connors Ilie Năstase Françoise Dürr Jean-Claude Barclay 6–1, 6–4 Betty Stöve Patrice Dominguez

June WeekTournamentChampionsRunners-upSemifinalistsQuarterfinalists 4 Jun Italian Open Rome, Italy Group A Clay – $101,600 – 96S/48D Ilie Năstase 6–1, 6–1, 6–1 Manuel Orantes Tom Okker Paolo Bertolucci Stan Smith Péter Szőke Jiří Hřebec Jan Kodeš John Newcombe Tom Okker 6–3, 6–2, 6–4 Ross Case Geoff Masters Berlin Open Berlin, West Germany Group C Clay – 32S/16D Hans-Jürgen Pohmann 6–3, 3–6, 6–3, 6–3 Karl Meiler Jürgen Fassbender Eddie Dibbs Attila Korpás Ulrich Pinner Harald Elschenbroich Bernard Mignot Jürgen Fassbender Hans-Jürgen Pohmann 4–6, 6–4, 6–4 Raúl Ramírez Joaquín Loyo-Mayo 11 Jun German Open Hamburg, West Germany Group B Clay – 62S/28D Eddie Dibbs 6–1, 3–6, 7–6, 6–3 Karl Meiler Jaime Fillol Jürgen Fassbender Paul Gerken Harald Elschenbroich Jiří Hřebec Martin Mulligan Jürgen Fassbender Hans-Jürgen Pohmann 7–6, 7–6, 7–6 Manuel Orantes Ion Țiriac John Player Open Nottingham, Great Britain Group B Grass – 40S/21D Erik van Dillen 3–6, 6–1, 6–1 Frew McMillan Tom Gorman Jimmy Connors Jaidip Mukerjea Mark Cox Dick Stockton Stephen Warboys Tom Gorman Erik van Dillen 6–4, 6–4 Bob Carmichael Frew McMillan 18 Jun Rothmans Championships London, Great Britain Group C Grass – 48S/32D Singles – Doubles Ilie Năstase 9–8, 6–3 Roger Taylor Alex Metreveli Owen Davidson Ismail El Shafei Jürgen Fassbender John Newcombe Cliff Drysdale Tom Okker Marty Riessen 6–4, 7–5 Ray Keldie Raymond Moore Rothmans South of England Championships Eastbourne, Great Britain Group B Grass – 32S/16D Mark Cox 6–2, 2–6, 6–3 Patrice Dominguez Onny Parun Allan Stone Paul Gerken Andrés Gimeno Ian Fletcher Graham Stilwell Ove Bengtson Jim McManus 6–4, 4–6, 7–5 Manuel Orantes Ion Țiriac25 Jun Wimbledon Championships London, Great Britain Grand Slam – Group AA Grass – 128S/64D/56XD Singles – Doubles – Mixed doubles Jan Kodeš 6–1, 9–8(7–5), 6–3 Alex Metreveli Sandy Mayer Roger Taylor Jürgen Fassbender Jimmy Connors Björn Borg Vijay Amritraj Jimmy Connors Ilie Năstase 3–6, 6–3, 6–4, 8–9(3–7), 6–1 John Cooper Neale Fraser Billie Jean King Owen Davidson 6–3, 6–2 Janet Newberry Raúl Ramírez

July WeekTournamentChampionsRunners-upSemifinalistsQuarterfinalists 9 Jul Swedish Open Båstad, Sweden Group B Clay – $50,000 – 32S/22D Singles – Doubles Stan Smith 6–4, 6–2, 7–6 Manuel Orantes Björn Borg Leif Johansson Martin Mulligan Jaime Pinto Bravo Bob Carmichael Antonio Zugarelli Nikola Pilić Stan Smith 2–6, 6–4, 6–4 Bob Carmichael Frew McMillan Swiss Open Gstaad, Switzerland Group B Clay – 32S Ilie Năstase 6–4, 6–3, 6–3 Roy Emerson Patrick Proisy Karl Meiler Brian Fairlie Allan Stone Sandy Mayer Tom Okker Green Shield Welsh Open Newport, Great Britain Group C Grass – 64S/32D Roger Taylor 9–8, 8–6 Bob Giltinan John Paish Jeff Simpson Terry Ryan John Bartlett Byron Bertram Dick Bohrnstedt Title shared. Bertram / Lloyd Giltinan / Keldie 16 Jul U.S. Professional Tennis Championships Boston, United States Group B Hard – 32S/16D Singles Jimmy Connors 6–3, 4–6, 6–4, 3–6, 6–2 Arthur Ashe Cliff Richey Clark Graebner Dick Stockton Marty Riessen John Alexander Roscoe Tanner Austrian Open Kitzbühel, Austria Group C Clay – 32S/17D Title shared. Raúl Ramírez Manuel Orantes Marcelo Lara Ion Țiriac Vladimír Zedník José Edison Mandarino Barry Phillips-Moore Vladimir Korotkov Jim McManus Raúl Ramírez 6–2, 6–2, 6–3 José Edison Mandarino Tito Vázquez Dutch Open Hilversum, the Netherlands Group C Clay – 32S/16D Singles Tom Okker 2–6, 6–4, 6–4, 6–7, 6–3 Andrés Gimeno Allan Stone Geoff Masters Wanaro N'Godrella Attila Korpás Ian Fletcher Iván Molina Iván Molina Allan Stone 4–6, 7–6, 6–4 Andrés Gimeno Antonio Muñoz 23 Jul Washington Star International Washington, United States Group A Clay – $75,000 – 64S/32D Arthur Ashe 6–4, 6–2 Tom Okker Jaime Fillol Tom Gorman Paul Gerken Marty Riessen Nikola Pilić Dick Stockton Ross Case Geoff Masters 2–6, 6–4, 6–4 Dick Crealy Andrew Pattison Volvo International Bretton Woods, United States Group C Clay – $25,000 – 32S/16D Singles – Doubles Vijay Amritraj 7–5, 2–6, 7–5 Jimmy Connors Ian Fletcher John Alexander Bob Carmichael Gerald Battrick Tom Edlefsen Rod Laver Rod Laver Fred Stolle 7–6, 4–6, 7–5 Bob Carmichael Frew McMillan 30 Jul First National Bank Classic Louisville, United States Group A Clay – $75,000 – 64S/32D Manuel Orantes 3–6, 6–3, 6–4 John Newcombe Vitas Gerulaitis Guillermo Vilas Dick Crealy Ross Case Nikola Pilić Antonio Muñoz Manuel Orantes Ion Țiriac 0–6, 6–4, 6–3 Clark Graebner John Newcombe Buckeye Championships Columbus, United States Group C Hard – $25,000 – 32S/16D Jimmy Connors 3–6, 6–3, 6–3 Charlie Pasarell Paul Gerken Haroon Rahim Pancho Gonzales Andrew Pattison Colin Dibley Brian Gottfried Gerald Battrick Graham Stilwell 6–4, 7–6 Colin Dibley Charlie Pasarell

August WeekTournamentChampionsRunners-upSemifinalistsQuarterfinalists 6 Aug Western Championships Cincinnati, United States Group B Clay – $50,000 – 32S/16D Ilie Năstase 5–7, 6–3, 6–4 Manuel Orantes Nikola Pilić Jimmy Connors John Alexander Guillermo Vilas Roscoe Tanner Patrick Proisy John Alexander Phil Dent 1–6, 7–6, 7–6 Brian Gottfried Raúl Ramírez Tanglewood International Tennis Classic Clemmons, United States Group C Clay – 32S/16D Jaime Fillol 6–2, 6–4 Gerald Battrick Jeff Borowiak Vijay Amritraj Ross Case Brian Fairlie Georges Goven Frew McMillan Bob Carmichael Frew McMillan 6–3, 6–4 Brian Fairlie Ismail El Shafei 13 Aug U.S. Clay Court Championships Indianapolis, United States Group B Clay – $90,000 – 50S/22D Manuel Orantes 6–4, 6–1, 6–4 Georges Goven Cliff Richey Raúl Ramírez Brian Gottfried Roscoe Tanner Patrick Proisy Paolo Bertolucci Bob Carmichael Frew McMillan 6–3, 6–4 Manuel Orantes Ion Țiriac Pennsylvania Championships Merion, United States Group C Grass – 64S/32D Mike Estep 7–5, 3–6, 7–6, 3–6, 7–5 Gene Scott Vijay Amritraj Herb Fitzgibbon Brian Teacher Ian Fletcher Anand Amritraj Jean-Baptiste Chanfreau Colin Dibley Allan Stone 7–6, 6–3 Jeff Austin Fred McNair 20 Aug Canadian Open Toronto, Ontario, Canada Group A Hard – $100,000 – 64S/32D Singles – Doubles Tom Okker 6–3, 6–2, 6–1 Manuel Orantes Cliff Drysdale Iván Molina Paolo Bertolucci Björn Borg John Newcombe Arthur Ashe Rod Laver Ken Rosewall 7–5, 7–6 Owen Davidson John Newcombe Eastern Championships South Orange, United States Group C Grass – 32S/16D Colin Dibley 6–4, 6–7, 6–4 Vijay Amritraj Pancho Gonzales Clark Graebner Paul Gerken Dick Stockton Ion Țiriac Onny Parun Jimmy Connors Ilie Năstase 6–7, 6–3, 6–2 Pancho Gonzales Tom Gorman 27 Aug US Open New York City, United States Grand Slam – Group AA Grass – $118,000–128S/62D/32XD Singles – Doubles – Mixed doubles John Newcombe 6–4, 1–6, 4–6, 6–2, 6–3 Jan Kodeš Stan Smith Ken Rosewall Onny Parun Nikola Pilić Vijay Amritraj Jimmy Connors Owen Davidson John Newcombe 7–5, 2–6, 7–5, 7–5 Rod Laver Ken Rosewall Billie Jean King Owen Davidson 6–3, 3–6, 7–6 Margaret Court Marty Riessen

September WeekTournamentChampionsRunners-upSemifinalistsQuarterfinalists 10 Sep U.S. Hard Court Championships Aptos, United States Group C Hard – 32S/16D Jeff Austin 7–6, 6–4 Onny Parun Haroon Rahim Dick Bohrnstedt Tom Edlefsen Erik van Dillen John Lloyd Mike Machette Jeff Austin Fred McNair 6–2, 6–1 Raymond Moore Onny Parun Rainier International Tennis Classic Seattle, United States Group C Carpet (i) – $37,500 – 32S/16D Singles – Doubles Tom Okker 7–5, 6–4 John Alexander Tom Gorman Cliff Richey Torben Ulrich Mark Cox Brian Gottfried Arthur Ashe Tom Gorman Tom Okker 2–6, 6–4, 7–6 Bob Carmichael Frew McMillan 17 Sep Pacific Southwest Open Los Angeles, United States Group A Hard – $75,000 – 64S/32D Singles – Doubles Jimmy Connors 7–5, 7–6(11–9) Tom Okker Raúl Ramírez Ilie Năstase Stan Smith Charlie Pasarell Ken Rosewall Raymond Moore Jan Kodeš Vladimír Zedník 6–2, 6–4 Jimmy Connors Ilie Năstase 24 Sep Pacific Coast Championships San Francisco, United States Group B Hard – $50,000 – 32S/16D Singles – Doubles Roy Emerson 5–7, 6–1, 6–4 Björn Borg Raymond Moore Arthur Ashe Stan Smith Tom Gorman Roscoe Tanner John Alexander Roy Emerson Stan Smith 6–2, 6–1 Ove Bengtson Jim McManus Tam International Chicago, United States Group B Carpet (i) – 32S/16D Tom Okker 3–6, 7–6, 6–3 John Newcombe Ilie Năstase Marty Riessen Graham Stilwell Gerald Battrick Eddie Dibbs Brian Gottfried Owen Davidson John Newcombe 6–7, 7–6, 7–6 Gerald Battrick Graham Stilwell

October