I wasn't looking at one innings either, but 2 tons in a series means your in pretty good form, no one ever ( apart from Bradman ) will score massive in every innings, if he failed for 20 innings then sure let's have a look at form. But then he is one of they best test bats going around so I doubt that would happen
no doubt Clarke is a great batsmen. and i am not suggesting he would be dropped. but players have been questioned for less.
i personally believe it is playing on Clarkes mind to. it would have given him and excuse to drop to his favoured number 5 atleast.
people have been dropped for less, look at Hughes kajawa etc etc.
hopefully once Johnson finishes off the sa tailment. he'll have a decent seconds innings