Why Bumrah cannot play SA test series?

Indian fast bowler Jasprit Bumrah has been ruled out of the upcoming three-match Test series against South Africa due to a minor stress fracture in his lower back. The Board of Control for Cricket in India (BCCI) revealed that Bumrah's injury was detected during a routine radiological screening and that he would now undergo rehabilitation at National Cricket Academy (NCA) in Karnataka.

"Team India fast bowler Jasprit Bumrah has sustained a minor stress fracture in his lower back and has been ruled out of the upcoming Paytm Freedom Series for Gandhi-Mandela Trophy against South Africa. The injury was detected during a routine radiological screening. He will now undergo rehabilitation at NCA and will be monitored by the BCCI Medical Team," the BCCI said in a press release.