Doctor says it's just strained ligaments...no tears and nothing permanent.
Ice, rest, wear brace, naproxen, no tennis for a while, and start stretching program (or else I'll continue to have knee and hip problems).
Thanks for everyone's input.
After microfracture knee surgery doc recommended I never play tennis again - been playing for 5 months now! Saving $$$ for APD'13 (x2)