The fourth Test of the Border-Gavaskar Series is set for a titanic finish after Australia's tail ensured India would need to chase more than 300 runs on the final day to win.

Australia heaved a major sigh of relief on Wednesday after skipper Pat Cummins declared run-machine Travis Head fit for the Boxing Day test against India at the Melbourne Cricket Ground.

Pat Cummins' side open up a 2-1 series lead and close in on a second consecutive appearance in the World Test Championship Final after a thrilling victory over India.