New Delhi: Spin bowling all-rounder Washington Sundar is unavailable for the first Test against Sri Lanka starting August 15 while injured all-rounder Nitish Kumar Reddy and fast bowler Harshit Rana are unlikely to be a part of the Indian squad for the two-Test tour.India will tour Sri Lanka for a two-Test series next month with the first Test to be played from August 15-19 at Galle, followed by the second at Colombo (SSC) from August 23-27.According to a BCCI source, Washington's availability for the second Test is subject to fitness after the all-rounder had suffered an injury to his leg during India's white-ball tour of England earlier this month.Also read | Prince Yadav's injury will force India to make a few changes, says Shreyas IyerAce India pacer Jasprit Bumrah, meanwhile, will remain on rest until July 30 before reporting to the BCCI's Centre of Excellence in Bengaluru.Top order batter B Sai Sudharsan's availability is also subject to fitness but the left-handed batter is said to be recovering well.Also read | India crush Zimbabwe by 90 runs in 2nd T20I