Cook: My position hasn't changed

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Embattled England skipper Alastair Cook said he will not be handing over the captaincy as his reign comes into question after the country's humbling Test series loss to India.

England were thrashed by an innings and 36 runs in the fourth Test in Mumbai, losing 13-4 on the final day as the hosts claimed an unassailable 3-0 lead with one match remaining.

The defeat heaped more pressure on Cook, who has overseen five losses from the past seven Tests, but the 31-year-old - captain since 2012 - said of his future in the role: "It's a question that was asked of me right at the start and it hasn't changed. 

"My position is the same as it was at the start of the tour.

"We have a debrief at the end of every tour, but my position hasn't changed."

England resumed on the final day needing 49 runs to force India to bat again, with four wickets remaining.

But they had no answer to spinner Ravichandran Ashwin, who claimed all four wickets on Monday to finish with figures of 6-55 and 12 for the match as England were dismissed for 195.

While the scrutiny on Cook intensifies, England head coach Trevor Bayliss offered his backing.

"No-one else is considering it. From my point of view he has the job for as long as he wants it," Bayliss said.

"At the end of the last 12, 18 months we've seen improvement on how he captains the team.

"When the team loses matches the captain takes a lot of the blame, but he's got broad shoulders.

"We've shown improvement in every Test. If we do that over four or five days, there's no reason why we can't win."