This is why I had a problem counting up the points. I never knew which rules they were going to apply for which tournaments. For Grand Slams, it seems to be up to their individual discretion. It's really silly. It needs to be uniform across the board. Venus and Serena didn't really need "Special Rankings". An injury ranking would have sufficed. It would have been about the same anyway. Serena stopped playing after Wimbledon 03 with a ranking of 1. Venus stopped at the same time with a ranking of 4.