No, they wouldn't be too interested in Hewitt, unless he manages to beat Federer somehow. Whether he makes it to the semi or not at this point, there are no big surprises so, no reason really to talk about him.
Has anyone been watching the press conferences on tennis channel? I have... and every day they interview James Blake, whether he played or not.
To be fair, they have interviewed Hewitt every day that he has played.
Lleyton probably likes keeping a low profile anyway.