Federer has looked very poor so far. He's fortunate that it's only Raonic on the other side of the court, who hasn't looked too great either (albeit still better than Roger), otherwise he'd most likely be 2-0 down here.
Whichever player wins this match, they'll going to have to step it up enormously from their play so far if they're not to lose in straight sets to Murray on Sunday (assuming that Andy wins later today).