Another bad news for RCB could be KL Rahul's unavailability, also due to a shoulder injury. Team sources said the India opener will soon be travelling to London to undergo surgery.
The 24-year old had hurt his left shoulder five weeks ago, in the first Test against Australia, but continued to play through pain for the rest of the series.
Regarding Kohli, RCB coach Daniel Vettori said, "Right now, we don't have a clear picture on his availability. We will know in the next few days. The likely scenario is that AB de Villiers will take over the duties, but we will answer that once we find out if Virat is out."
"He will come in on April 2. Between now and then, BCCI doctors and physio will speak to us and our medical staff will get a clearer picture," he said.
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Kohli hurt his right shoulder during the third Test of the series against Australia in Ranchi.
Owing to these injuries, Sarfaraz Khan could get an opportunity early on in the tournament, for he has been really good this domestic season, Vettori said.
"Sarfaraz has been really good. At the back end of the domestic season he started to put some runs on the board. Everyone knows how talented he is. With possible injuries, he could get an opportunity early on in the tournament," he said.
"Fortunately, we have a number of exceptional batsmen who haven't got many playing chances, like Sarfaraz Khan and Mandeep Singh. It is a huge asset for us that someone else can fill in those gaps," he said.
Vettori said Kohli and KL Rahul are accustomed to the rigours of international schedule.
"They are accustomed to this. Virat has played for the country for so long, so he is familiar with the rigours of international schedule and the IPL. Yet, he still performs well like we saw last year," he said.
Vettori said it is important that players get rest because they have to play about 15 matches and managing them becomes that much important," he said.
On Mitchell Starc's absence, Vettori said Tymal Mills
will have to fill in the shoes of the Australian pacer, and he would fit into the scheme of things.
"It wasn't just us bidding for him. A lot of teams had scouted him and understood that he was a good player, how he could be effective for a team. It is always nice to be popular, isn't it? I have known him from Brisbane Heat, got a really good feel for him as a person and a player. He will fit in really well with our group," Vettori added.
"Having a lot of overseas options, is not a headache. It just gives us an opportunity to manage our fast bowlers, going by how tough our schedule is.
"We have got Billy Stanlake, Tymal, Adam Milne and Samuel Badree ... All proven performers. I am sure they will all get an opportunity," he said.