The only one I know of is the one Tennis Insight offers for the different surfaces. Is there any other ones out there? Sort of like the Sagarin Ratings for WTA and ATP players?
Also for TI ratings, if you are a member do they still only list the top 20 on each surface or as a paying customer do you get more than that. Or what else do you get from paying? Please fill me in here. Because they don't seem to have the surface rankings for women as a freebie.
Thanks!