Rohit Sharma said that he has been given the ok by the team to fly back to Mumbai for a medical examination and to consult a specialist, according to Dravid. It's unlikely that the Test series will be played as early as December 14, according to the BCCI. Rohit Sharma fractured his finger in the second ODI against New Zealand and underwent surgery. Unfortunately, he also suffered a cut that required stitches. It's unlikely that KL Rahul would be selected in case Rohit Sharma doesn't recover. If Rohit Sharma doesn't recover, KL Rahul would be the natural replacement.
A dislocated finger requires two weeks to heal, and Rohit also suffered a cut which required stitches. Rohit tried to win the match with a taped-up thumb in the second ODI but he is unlikely to do the same for the Test series.