Took a 2 week break from tennis and got back onto the court on Thurs - spent 2.5 hrs hitting on hardcourt after spending most of summer on clay and my left knee was killing me. Went out for another 2.5 hr hit today and my knee was fine.
Your body gets a shock with change of surface and Andy is just going through the same.
Indeed it does. I used to experience the same thing. Hard courts are murder on the body for 2 or 3 days, and it's probably even worse making the sudden transition from grass to hard as Andy had to do.
