A Marnus Labuschagne half-century and stubborn tail-end batting drove Australia to a 333-run lead at the end of day four in the fourth test in Melbourne on Sunday, leaving India facing a record chase to steal victory.

Teenage debutant Sam Konstas will bat for the second time in the Boxing Day Test after India were out for 369, giving Australia a lead of 105 at the MCG.

Australia lost both openers as they reached 53-2 at lunch on Sunday to extend their lead to 158 over India on day four of the fourth Test in Melbourne. The 21-year-old, playing just his fourth Test, finished with the highest Test score in Melbourne for any player batting at number eight or lower.