England captain Andrew Strauss believes Australia have made a "big call" by axing Mitchell Johnson for the second Ashes Test.
Johnson has paid the price for a disappointing display in the first Test - with the left-arm seamer finishing with match figures of 0-170.
As a result Ryan Harris and Doug Bollinger have been retained in the 13-man squad for the match at the Adelaide Oval.
And although surprised at Australia's decision, Strauss insists that his squad are solely focused on the task ahead.
"Mitchell has been a very good performer for Australia over a number of years, and has been spearheading their attack - so it's quite a big call for them to leave him out," said Strauss, who was dropped by Johnson in the second innings on his way to scoring a century.
"But it's not something that concerns us. We've got to be ready for whoever might take his place and make sure we've got plans in place to counteract them."
Strauss has dismissed suggestions England may have batted Johnson out of the team with their second-innings total of 517-1 at the Gabba.
Strauss added: "You can't worry about what's happened already too much, or you can get sidetracked by it.
"This is a new set of circumstances, different conditions, and it's going to be a slightly different bowling attack.
"You've got to be prepared to play what's ahead of you, not behind you."