Rules of professional tennis in the past of the open aera
There are a lot of questions for me especially in the period of the 70's...
1. How it was determined who is seeded and on which position before
2. How did the system of rankings in the 70's?
3. How it was determined who is in the maindraw directly and who has to go through qualifying/prequalifying?
(I remember there was a strange thing going on with Pam Shriver in a tournament as she had to start in prequalifying made it to qualifying made it to the main draw and then was seeded #2 in the main draw. How came?)
4. When most of the tournaments started to use the official WTA-Rankings for there seeding and distributing main-Draw spots?