India, Dec. 22 -- England coach, Brendon McCullum, admitted his side's build-up will come under scrutiny after Australia sealed the Ashes with an 82-run win in the third Test at the Adelaide Oval, taking an unassailable 3-0 lead.

With two matches still left in the series, England now head to Melbourne looking for a response in the Boxing Day Test at the MCG starting December 26.

Speaking to TNT Sports, McCullum said the questions would be unavoidable after a clean sweep in the first three games.

"What did we get right? What did we get wrong? Probably we go back to the preparation, that'll be something that gets questioned," McCullum said.

"And when you have lost 3-0, you need to put your hand up and say 'maybe I didn't get that prepar...