Melbourne, Dec 28 (IANS) Australian star all-rounder Shane Watson's recovery from a calf injury has been slower than expected and he could miss the entire Test series against India.

Watson was expected to be fit for the second Test in Sydney, but is yet to resume batting or bowling. He is working with Australian team at the Melbourne Cricket Ground (MCG) and so far has restricted his training to the workout in the gym.

"He had a gym session today with Alex Kountouris (team physio) but he is not batting or bowling yet. He is a work in progress," a Cricket Australia spokesman was quoted as saying by Sydney Morning Herald.

Hopes of Watson making a comeback revived after he attended the three-day batting camp at the MCG ahead of the first Test.

Watson, who spoke at a CA corporate lunch at the MCG Monday, said he was extremely disappointed at missing out on the Boxing Day Test.

"The word from Shane Watson was that he is not fit to play. He has had ongoing troubles with his calf. His situation is improving and we hope he is in contention for the second Test. It is an option for him to bat down the order," national selector John Inverarity had said last week.

Watson suffered the injury on the tour of South Africa last month.