Carlos can beat Hewitt as many times as he wants, but not to assault the number one. I mean, i like a lot Carlos but he is not as consistent as Hewitt (even being one of the most consistent players on the tour), Moya can beat Marat, Hewitt and Costa in his best shape, but later to lose against ferrero or anyone else, while Hewitt, Hewitt is as solid as a rock.
so i guess that we will have a Potato ruling the ATP for a lon long time, i just see Marat or Guga avoiding it, but Marat needs to hire a good psychologist to control his fury and Guga needs to be healthy