By Ian Ransom MELBOURNE (Reuters) -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.

The scenarios are clear-cut for Australia going into the final match of the five-test series with India at the Sydney Cricket Ground.

Rohit Sharma may have played his final Test match after India coach Gautam Gambhir refused to confirm whether his captain would play in the final game of the series against Australia in Sydney. The home side sealed a thrilling 184-run victory at Melbourne Cricket Ground to take a 2-1 series lead after a superb bowling performance in the evening