Injured Rohit out of India Test team against Bangladesh
Fast bowler Mohammed Shami and Ravindra Jadeja have been ruled out of the series as they are yet to recover from their respective injuries.
"Rohit Sharma met with a specialist in Mumbai for his left thumb injury, which he sustained during the 2nd ODI against Bangladesh," the Board of Control for Cricket on India said in a statement.
"The BCCI Medical Team will take a call on his availability for the second and final Test at a later stage."
Bangladesh won the ODI series 2-1 but India did had a consolation victory in the third. KL Rahul, who skippered them in that game, will lead the team in the first Test with Cheteshwar Pujara as his deputy.
Uncapped batsman Abhimanyu Easwaran has been named Rohit's replacement for the opener starting December 14 in Chittagong.
The national selectors have named Navdeep Saini and Saurabh Kumar as replacements for Shami (shoulder injury) and Jadeja (knee injury)
Fast bowler Jaydev Unadkat has also been added to the 17-member squad for the matches, which will be part of the World Test Championship.
Unadkat, a left-arm quick, played his only Test in 2010 and last played a Twenty20 international for India in 2018.
Squad: KL Rahul (capt), Shubman Gill, Cheteshwar Pujara, Virat Kohli, Shreyas Iyer, Rishabh Pant (wk), KS Bharat (wk), Ravichandran Ashwin, Axar Patel, Kuldeep Yadav, Shardul Thakur, Mohammed Siraj, Umesh Yadav, Abhimanyu Easwaran, Navdeep Saini, Saurabh Kumar, Jaydev Unadkat