'I'll say definitely not a chance of missing but at this stage, we can't predict how long it's going to take to get right,' he said.
'If you ask Australia physio Alex Kountouris I'm sure he'll say there is that chance. For me personally, I'm trying not to look at that. It's about being nice and positive and working my backside off and getting myself right.'
The timing of the limited-overs series in India has been questioned, with the final game of the tour to be played just 19 days before the first Test.
England, who hold the Ashes after their 3-0 series win earlier this year, arrive in Australia on October 25, but Clarke said there was no advantage for the tourists arriving ahead of the hosts.
