Mahendra Singh Dhoni and Harbhajan Singh will undergo fitness tests at the National Cricket Academy on Friday © AFP Enlarge

Harbhajan Singh and Mahendra Singh Dhoni, who missed the mandatory fitness tests prior to their inclusion for the first two Tests against South Africa, will undergo the procedure at the National Cricket Academy in Bangalore on March 21.

Both Harbhajan and Dhoni were included by the selectors in the 14-member squad, and were asked to report to the NCA for fitness tests on March 21. Harbhajan was a doubtful starter for the series since he had been suffering from a hamstring injury, while Dhoni had sprained his finger during the second final against Australia in the CB Series.

If Dhoni doesn't clear the test, Dinesh Karthik will take up the wicketkeeping duties, while Harbhajan's absence may pave the way for Piyush Chawla to take over the second spinner's role behind captain Anil Kumble. Fast bowler Ishant Sharma has already been ruled out of the first Test, and his selection for the second is subject to fitness.

Sachin Tendulkar is another member of the 14-man squad who has not taken the test. According to new BCCI norms, players who have been out of action for a month need to prove their fitness at the NCA ahead of any series. Although Tendulkar had taken part in the CB Series earlier this month, he had been advised two weeks' rest by John Gloster, the outgoing team physio. However, Tendulkar later said he was fit to take part in the series.