Langer agrees with Vaughan that county cricket is not tough enough

After England's 191-run fourth Test defeat to South Africa, Vaughan blamed the domestic system, saying it did not produce players mentally tough enough for Test cricket.

Langer, who played three seasons of county cricket with Middlesex, agreed, telling the BBC Sport website: "Whatever a coach does, when the pressure comes on players they're going to struggle.

Read more: Langer answers your emails

"There has been a lot of talk about the Academy making a difference and two divisions making a difference.

"But in my opinion while the county system remains the same as it is now those things aren't going to be as effective.

"Ultimately [Academy] players go back to play county cricket where they're not subject to enough pressure to be ready to step into the pressure of Test cricket."

Langer was part of the Australia side that beat England 4-1 last winter - their eighth consecutive Ashes series victory.

"England have some good players and good leaders but deep down they haven't been subject to enough tough cricket," he added.

If you have eight meaningful games, if England players are available, county members would be happy Colin Graves

Yorkshire chief executive Colin Graves believes the England and Wales Cricket Board (ECB) should restructure the whole game.

"The ECB has got to get its act together and look at the structure of cricket, the toughness of players and the fitness of players," he told BBC Radio Four.

"Nobody goes to watch the County Championship matches," he went on. "It's disappointing when you go to Championship games and there's nobody there.

"If you have eight meaningful games, if England players are available, county members would be happy."

Graves cited Yorkshire's injury-hit attack, which includes four current and former England players, as evidence of too many games.

"They do play too much cricket," he added. "People are always injured so something is wrong somewhere."

Speaking on Monday, after England had just lost the fourth Test, Vaughan took aim at the mental approach produced by county cricket.

Feature: England's test of character

"English players have long had a laid-back attitude where we play so much county cricket it can get boring," he said.

"When you get on top of an opposition in Test cricket, especially against a good side like South Africa, you have to make those situations count.