Raonic lost a set? Weird
Not weird. Raonic had a fantastic and dreamed performance in the AO but don`t forget that he still belongs to the challenger tour and is making his first steps in the ATP tournaments. That is going to take him a while to make the jump.
I agree with you that the victory in 2nd round was tougher than we would had expected.
Probably he is facing some troubles to get used to the height of Joburg as the ball flies much more than in Australia and might be facing troubles to control it. And Levy is not going to be exactly a piece of cake.