Shastri's comments come after India suffered their first-ever Test series loss at home in 12 years, through a 113-run defeat to New Zealand in the second Test at Pune
Rohit Sharma and Virat Kohli struggled with the bat, while the formidable spin duo of R Ashwin and Ravindra Jadeja also failed to make a significant impact
India's fielding coach T Dilip hailing Washington's outstanding improvement and noted that he appeared as a "different" player in terms of his fielding improvement
Kohli and Gambhir, former teammates for Team India across various formats, had several notable on-field altercations, especially in the Indian Premier League (IPL), which often made headlines.