Andy's fitness is not the issue what I was referring to is the different conditions and taking time to get used to them, Fed is well used to the speed of the ball etc. Whereas Andy has played in the heat with the ball travelling faster etc.
Andy says new conditions, even small changes need to be adapted to. Heat changes the pace of the ball as well as the effect on the player. He usually needs a bit of time to adjust and settle down. Seems to be more of a thing with him, at least he talks about it more that the others.