Possible.
I do hope, he had a talk with Sachin who is known to be cool in such matters but it would be good to say to him
"boss, I think I am going to go and have a bash. If it works fine, if it doesn't you take over". - or something to that effect.
Just for information. I all Test matches in the last 12 months, since the tour of Pakistan to India, Sachin has scored
887 Test runs at 63.4 per 100 balls
while Dhoni has scored
568 at 51.1
It was well under 50 till this last test for Dhoni.
For Sachin it includes innings like the painstaking 126 ball 49 to save the Test at Bangalore where Dhoni did not have to bat.