However, Rohit Sharma won't be playing in the white-ball series as he is now training at the National Cricket Academy (NCA) in Bangalore.
So, when Ravi Shastri said the duo need to board the flight in 3-4 days to be able to participate in the Tests, he may have given it away.
The four-match Test series between India and Australia is all set to begin from December 17 in Adelaide.
Considering the mandatory 14-day quarantine requirement, it is clear that they would miss the first warm-up game against Australia A from 6-8 December, if they don't depart by Monday. It could become tough for him to come just before the Test series. India are scheduled to play three ODIs, three T20Is and four Tests in Australia. "If you aren't, then it's going to be tough", Shastri said.
But Rohit Sharma and Ishant both are not in bubble at the moment in the NCA.
Even before the start of their Australia tour, India are suffering from injury issues.
Rohit, however, returned to play for his franchise after missing four matches and was eventually included in the Test squad.
As per several reports, their chances of featuring in the final two Tests also remain bleak. Rohit Sharma has been vital in the Indian cricket team top-order and his partnership with Shikhar Dhawan has helped India establish a level of dominance against Australia where they have not lost only one series against them in the last three years.
Reportedly, the selectors could rope in middle-order batsman Shreyas Iyer if Rohit gets ruled out. "He (Rohit) was never going to play the white-ball series, they were just looking to see how long he needed the rest, because you can't afford to be resting for too long", the head coach said.
While saying it was a sensitive matter, Shastri backed the Indian captain's decision to fly back home for the birth of his first child. The right-handed batsman is yet to make his debut in the longest format of the game but has a good record in first-class cricket. However, he is unlikely to be a part of the Test squad in Australia.
As far as Ishant is concerned, the BCCI advisory had said: "The senior Indian fast bowler has been undergoing his rehab at the National Cricket Academy in Bengaluru".