Mumbai Indians' left-arm pace bowler Zaheer Khan is unlikely to play against the Royal Challengers Bangalore in their IPL clash at the Wankhede stadium on Tuesday, after injuring his bowling arm in the previous game here last Saturday.

"Zaheer has strained his left latissmus dorsi muscle. He is undergoing thorough medical assessment and we are awaiting the reports. It is a bit of a blow for us. But we hope, it is not too serious, not only for IPL but his other international commitments. He is unlikely to play tomorrow. It pretty much looks like it (that he won't play)," MI head coach John Wright told reporters at the pre-match press conference.