However, the Indian captain said he was looking forward to have Sehwag back in the side as his presence will benefit the team.
The Board of Control for Cricket in India (BCCI) has asked Sehwag to report back August 15 for assessing the extent of his recovery.
Dhoni said the team might have a preparatory camp before the tri-series beginning September 8. Apart from India and hosts Sri Lanka, New Zealand is the third side in the tourney.
'We might have the preparatory camp (that will) help us get into the groove and prepare for the season ahead,' Dhoni said.