Australia could find it difficult to retain their dominance in world cricket when the current squad retires, according to Test star Justin Langer.
Langer has been part of the Test squad for a decade
The batsman told the BBC Sport website Australia will find it hard to replace the likes of Steve Waugh, Glenn McGrath, Shane Warne and Adam Gilchrist.
The majority of Australia's squad is over 30 but because of their continuing phenomenal success, selectors have resisted making wholesale changes.
In the next two or three years though it is inevitable changes will occur and Australia will have to blood young players.
Langer said: "Cricket is a cyclical thing and Australia are in a great phase at the moment.
"Of course we are worried when the greats have to retire.
"What we are trying to do at the moment is to set a standard, which is obviously always going to be hard to maintain.
"But that's the ultimate ambition. To set a culture so that young guys coming in maintain the level of expectation."
Langer in action during the Test series against West Indies
World Cup champions Australia have set the world record for the most consecutive Test wins and recently went 21 games unbeaten in one-day internationals - another record.
Langer said:"Obviously it's not necessarily going to be all rosy like it is at the moment.
"But from the senior players' point of view, it is not only important to win now but to develop and encourage the younger players that do come through.
"The important thing is in the culture which is so strong."
Langer, 32, wants to keep playing cricket at the top level until his body can no longer take it.
He said: "I think older players can handle the pressure and concentration more than younger players.
"But it takes more of a toll on the body. As long as my body holds up and I am enjoying playing, I will carry on."
Langer was in great form in Australia's 3-1 Test series win in the Caribbean, scoring 483 runs, including two centuries.
But he then flew home to Perth because he was not selected for the one-day internationals against the West Indies.
Langer has only played eight ODIs for Australia - the last time being in 1997.
He said: "I am disappointed because I would love to be in the one-day side.
"It is hard to take and I never like leaving the team but I do respect there are a lot of good players in the Australian team.
"Adam Gilchrist opens the batting in the one-day side, which takes away a specialist batting position.
"I would cherish playing one-day cricket again and it might still happen.
"If it doesn't I will concentrate on being as good a Test player as I can be."