A dramatic second-innings Australian collapse in Delhi - they lost their last eight wickets for 28 runs - meant India have the Border-Gavaskar Trophy all wrapped up with two Tests to play (as holders, they retain the trophy even if the series is drawn). This, despite the hosts having looked vulnerable at various points during the match. Where did the match turn (no pun intended)? Karthik Krishnaswamy and Alex Malcolm look back.