India spinner Kuldeep Yadav says he is fully focused on Test cricket ahead of the one-off Afghanistan Test. After Delhi Capitals' early IPL exit, he used the extra time to prepare for red-ball cricket, admitting the transition from T20s is “tough.” With Ravindra Jadeja and Axar Patel rested, Kuldeep will lead the spin attack and has backed youngsters Harsh Dubey and Manav Suthar to perform well.