Well - put it this way: I wouldn't be surprised.
They could completely fold and get annihilated, as they did against the Patriots in England, OR...show up and inexplicably play inspired football.
I assume the reason you are asking that question is that it has long been one of the hallmarks of Jeff Fisher's teams.
They show up and play well when no one expects them to. They occasionally beat generally superior teams (see their record vs the Seahawks over the last few years).
Of course the flip side of that is true as well - they consistently lose games they SHOULD win if they want to be a better-than-annoying team.
Thus the never-ending Fisher cycle of mediocre despair and endless futility continues...
sanfRAM