Haha - just read this:
Happy 40th birthday, ATP computer rankings
The ATP computer rankings made their debut on Aug. 23, 1973
"It became very important in the history of the ATP," says Raymond Moore, the first administrator
Four decades in, the computer rankings are indispensable, providing clarity and coherence.http://www.usatoday.com/story/sports/tennis/2013/08/19/atp-computer-rankings-turn-40/2674637/
Laundry @ 5.31am! Sorry, still don't agree - don't think Masters points can be replaced by other tournaments, except for MC which is not mandatory.