Dual Ashes winner Martyn believes it is down to those who have fallen short in the first two Investec Tests, by a whisker at Trent Bridge and then a mile at Lord's, to respond in adversity in the three that remain.
He knows what it takes to win the Ashes but also the pain of losing them, having done the latter in 2005 and ended his Test career before the business end of Australia's home whitewash of England in 2006/07.
As one of his country's most accomplished middle-order batsmen, in an era when Australia had riches they could scarcely dream of these days, Martyn still hopes the current crop can buck up their ideas under Michael Clarke's captaincy.
"There are no miracles out there to pick ourselves up," said the 41-year-old, who retired with an average of more than 46 in 67 Tests. "I'd just play the team and then at the end of this Ashes judge them on their performances."
Personal responsibility is key, as far as Martyn is concerned.
He added: "When I go out to bat, only I can make runs. Everyone can tell me everything and coach me. But mentally in a pressure situation you've just got to do it yourself; you've just got to gain the experience."
Shane Watson is perhaps a case in point, a habitual lbw candidate at the top of the order so far this summer and still searching for only his third Test century after 43 matches.
"He's talented, he's very good," said Martyn, who is reminded by Watson's travails of the stranglehold Australia seamer Terry Alderman once had over England opener Graham Gooch.
"He gets out lbw for 50s, 40s, 30s. It's hard to explain. Probably only he could explain it.
"It's a bit like the Terry Alderman, Graham Gooch thing. Terry kept picking him off in 1989 - and he was one of the greats, Gooch. Watto at the moment is under pressure."