Btw, Hollywood, I very much recommend Mizunos for running. I would, however, also suggest that you go to a running store where they can watch you run and suggest a few shoes that suit you best according to your gait.
My problem, and I dealt with it once before (oddly enough, the last time I trained for the Army 10 miler the same thing happened) is Illiotibial Band Syndrome
. Pretty much a whole lot of overuse. Guess the running plus tennis was not such a great idea.
I do have a friend who will buy my registration, though, so at least I will get my money back.