I will also backup here Federer.He is number one in world and so far he looks good to defend title.He only had problems against Tipsarevic but from that match he beat Berdych easily 3-0 6-4,7-6,6-3 comfortably.He learn his lesson against Tipsarevic and he wont let any other player who is underdog against him like Blake to surprise him.Blake beat in last round Marin Cilic who make some upsets here in AO.But he is not in his top form and that result isn’t the right measure.Federer and Blake meet with each other seven times and score is 7-0 to Federer!.Simply Blake is the type of player who cannot play well against machine like Roger.Federer will win this 3-0 but odds on that bet are simply low so I decided to take under in this game as I expect to Roger trash again Blake.Expekt a similar match like when Federer-Berdych and same score and I think that maximum here to Blake is to get Roger in one tie-break.