Baghdatis, Berdych and Gasquet are just lacking confidence/motivation. Exactly like Nalbandian before this week. They have enough weapons to beat Fed/Nadal on their day.
Gasquet and berdych have been lacking confidence/motivation for a long time. Baghdatis has been a first class MUG the past year or so.
A surprise upset is not out of the realm of possibility but to approach the level of a rivalry is something i am skeptical about with respect to these other players.
Even, then there are few players with weapons + mental ability to challenge roger regularly.