i do not think American tennis is going to be as dominant as it used to be.
On womens's side, the williams sisters are on decline. Justine and Clister are the players to watch now. On man's side, other than Rodick, there isn't any american player that is title contender, neverthelss the slam. Rodick has won the US open but he benefited so much from the rain delay and the scheduling gaffels. The player to watch is Rodger Federer. The guy posses all kind of shot and he will use it. some of the shots he pulled off were so specultacular that no many pro would even try it.