Criticising coach Ravi Shastri for his statement that the Virat Kohli-led side is the best Indian travelling side in the last 15-20 years, ex-cricketer Gautam Gambhir said people who haven't won anything give such statements. "I don't know what Shastri has achieved in his career," he further said. He added that Shastri's statement was very immature and childish.