Riding on left-arm spinner Ravindra Jadeja’s best bowling figures in an innings in Test cricket (7/42) along with Ravichandran Ashwin’s spin masterclass, India defeated Australia by six wickets in the second Test within three days to take 2-0 lead in the four-match series at the Arun Jaitley Stadium, here on Sunday. India retained the Border-Gavaskar Trophy by taking a 2-0 lead in the four-match series. Pujara (31*) and Bharat (23*) played till the end to guide their team home.