A look back at the crucial passages of play during day four between India and Australia at the MA Chidambaram Stadium.
India's spinners grabbed nine wickets for 175 runs in 65.5 overs to set up hopes of a four-day victory, but were left frustrated by a stubborn last-wicket stand of 57 between Moises Henriques and Nathan Lyon. Australia found themselves battling for survival in the face of a 192-run deficit following India's surge to 572, and India were lifted by R Ashwin's five wickets, but Henriques and Lyon ensured the match would go into the final day.
The manner in which the Australian batsmen struggled was in stark contrast to the way MS Dhoni biffed his way to 224, the highest score by an Indian captain in Tests.
Here are the key moments of the day: