What I just did is use the system from 1976 backwards into 1976 with appreciation to the prize pool of 1975.

So, if, you look in 1976, you have tournament categories above 175K, which should not exist in 1975, since there was no main tournament above this prize pool. Anything below this prize pool should be exactly the same in 1975, so 80-60-40-20 as max points for low tier tournaments, and anything above this (TC) should award 100 points to the winner. I used Borg as a calculation. You will notice a slight difference between his tournament total and the official total. That difference is the bonus points for winning against top players, and the amounts are yet to be determined.

1976

10

45

40

20

50

40

1

10

10

60

35

140

80

105

20

--------

Tournament Total: 666

Bonus Total: 123

Total: 789

1975

3

40

40

30

20

30

10

20

1

15

100

20

10

7

80

70

30

60

40

----------

Tournament Total: 626

Bonus Total: 102

Total: 728

Seemingly, there is a statistical chance that this is the correct system for 1975, as the ratios between Borg's total are similar. In 1975, the bonus points are about 14% of his total. And in 1976, 15.5%.

So, I say that, Mr Puppo could try to use this system for 1975, see where his calculations may lead him. I'm not 100% sure of it though, so take note:

` TC 125-175 75-125 50-75 25-50`

W 100 80 60 40 20

F 75 60 45 30 15

SF 50 40 30 20 10

QF 25 20 15 10 5

R16 15 10 7 5 3

R32 7 5 3 1 1

R64 3 1 1 - -

R128 1 - - - -

And Vilas:

`Munich - 40p`

Bournemouth - 20p

Hamburg - 15p

Rome - 30p

RG - 75p

Nottingham - 15p

Wimbledon - 25p

Gstaad - 20p

Hilversum - 40p

Washington - 60p

Indianapolis - 40p

Louisville - 60p

Boston - 45p

US Open - 50p

San Francisco - 45p

Madrid - 20p

Barcelona - 40p

Tehran - 30p

Paris - 5p

Stockholm - 1p

Buenos Aires - 60p

------------------------

Tournament Total: 826p

Bonus Total: 67p

Total: 893p

We can take note that the bonus amount for Vilas may be smaller due to winning against less top players. But until we find out which were the bonus amounts, we can't know for sure. Mr Puppo, if you can contact Mr Vilas and find out a little more about these possible bonus points, we could be in business 100%.