Andrew Flintoff thinks the England selectors need to be ruthless and drop Paul Collingwood in favour of Eoin Morgan for the final Ashes Test.
Collingwood has struggled for runs in Australia, while Morgan has not played any part in the first four Tests which have seen England retain the urn.
But Flintoff, who was forced to retire from international cricket last year because of injury, has backed one-day specialist Morgan to make his mark in the longer form of the game.
"I know people bang on about not changing a winning side but if England want to become the best side in the world they have got to be ruthless," Flintoff wrote in his News of the World column.
"Colly has been a brilliant servant for English cricket and is well liked by the management.
"This is England's chance to show there is no room for sentiment within their squad."
Flintoff added: "Morgan is as mentally tough as anyone I've seen emerge recently. He's got the million dollar shots but they're so finely tuned he cuts out a lot of risk.
"There's a bit of the Kevin Pietersen in his ability to improvise and make risky shots look simple and he is as cool as they come under pressure."
Collingwood, 34, is a veteran of 67 Tests but admits himself that time is running short for him to arrest his slump in form.
"The bottom line is that, at my age, if you're not scoring runs yourself you don't deserve a place in the side," the Durham batsman told the Mail on Sunday.
"If this does turn out to be my last Test match, if, after this week, the selectors come to me and say it's time to go or I felt that myself, I'd leave very proud of what I've contributed to the England cricket team."