Why have India not picked Kuldeep for Australia series?

The BCCI announced an 18-member squad for the Border-Gavaskar Trophy against Australia, starting November 22. Notable omissions include Mohammed Shami, Axar Patel, and Kuldeep Yadav. The left-arm wrist-spinner had featured recently in the first Test against New Zealand in Bengaluru but will not be featuring in Australia.