Have your scoured the web to find out if there are sites that offer to put people together in your area? Unless there are none, or you have something unique to offer, you may be reinventing the wheel. Another thought: do you live in a sufficiently populous area to justify what you're considering?
I agree that age should not be a factor, however, you may find others who would like to find someone of a similar level AND a similar age. That could be especially true for the person looking for social tennis as opposed to competitive tennis. So, including age as an optional search parameter might suit a broader audience and make your site more appealing and more useful.
Just my humble opinion.