1973 Grand Prix (tennis)

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 miss 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

Grand Prix points system
The tournaments listed above were divided into four groups. Group AA consisted of the Triple Crown – the French Open, the Wimbledon Championships and the US Open – while the other tournaments were divided into Groups A, B and C by prize money and draw size. Points were allocated based on these groups and the finishing position of a player in a tournament. No points were awarded to first round losers and ties were settled by the number of tournaments played. The points allocation is listed below:

Grand Prix rankings
1) Ilie Năstase 610 points, 2) John Newcombe 512.5 points, 3) Tom Okker 498 points, 4) Jimmy Connors 383 points, 5) Manuel Orantes 358.5 points, 6) Jan Kodeš 315 points, 7) Stan Smith 274 points, 8) Tom Gorman 270 points, 9) Björn Borg 240 points, 10) Arthur Ashe 236 points, 11) Rod Laver 230 points, 12) Nikki Pilic 210 points, 13) Jaime Fillol 203 points, 14) Raúl Ramírez 186.5 points, 15) Onny Parun 177 points, 16) Vijay Amritraj 169.5 points, 17) Ken Rosewall 169 points, 18) Eddie Dibbs 155 points, 19) Karl Meiler 155 points, 20) Marty Riessen 141 points, 21) Alex Metreveli 141 points, 22) Jiří Hřebec 131 points, 23) Ross Case 126 points, 24) Roger Taylor 126 points, 25) Guillermo Vilas 121 points, 26) Adriano Panatta 119 points, 27) Brian Gottfried 118 points, 28) Mark Cox 118 points, 29) Jürgen Fassbender 115 points, 30) Charles Pasarell 112 points, 31) Cliff Drysdale 112 points, 32) Paolo Bertolucci 104 points, 33) Geoff Masters 100 points, 34) Ray Moore 98 points, 35) John Alexander 98 points

ATP rankings
On 23 August 1973 the Association of Tennis Professionals published its first list of computer rankings, using points averages rather than points totals in their calculations. These are the ATP rankings of the top twenty singles players in the first list and at the end of the 1973 season, with numbers of ranking points, points averages, numbers of tournaments played, year-end rankings in 1973, highest and lowest positions during the season and number of spots gained or lost from the first rankings to the year-end rankings.