I have been playing every night for two hours, for the last two weeks, and my feet are killing me. I took four days off, and they felt good as new. As soon as I got back on the court, after about 10 minutes of moving around, my left foot started hurting again. It hurts towards the back of my foot, does not feel like the achilles, but around the ankle and bottom of the foot. I can stand on my toes and move around fine on my toes, but when I put pressure on the back of my foot it aches, badly. Any ideas on how to make this any better? I tried buying a new pair of sneakers that would be easier on my feet, but that has not helped to much.