Steve Smith's century and Glenn Maxwell's breakthrough performance pushed Australia to 4-299 at stumps on day one of the third test against India.
Smith and Maxwell dominated the hosts on Thursday, sharing an unbeaten 159-run stand in Ranchi.
It is already Australia's highest fifth-wicket test partnership in India and comfortably the highest stand in the ongoing four-Test series.
Smith's class, Maxwell's composure, India's misfields and Virat Kohli's shoulder injury have handed Australia the perfect platform to push for a victory that will ensure they retain the Border-Gavaskar trophy.
Smith won arguably the most important toss of his career then batted for 320 minutes with the same determination he has showed throughout the series, finishing 117 not out.