Australia great Shane Warne launched an attack on former coach John Buchanan for his criticism of retiring captain Michael Clarke.

Buchanan had told News Limited that the baggy green culture had "disappeared a bit" under Clarke's leadership.

Warne, a friend of Clarke's, hit back on Thursday, dismissing Buchanan's suggestion before attacking his former coach.

"It's an absolute joke, really. Guys like John Buchanan trying to do cheap shots and say that he's let the culture of the baggy green [down], give us a break mate, are you for real?" Warne told Channel Nine.

"This bloke had no idea about the game of cricket, John Buchanan. Never played the game, doesn't know what the players go through and suddenly starts saying he wrecked the culture of the baggy green.

"I mean that is just a disgraceful comment from someone that had no idea about the game of cricket."

Warne and Buchanan endured a cold relationship even when the leg-spinning great was playing under the latter.

The 45-year-old Warne said the results under Clarke had been strong, despite the Ashes failure in England.

"Michael Clarke loves playing cricket for Australia," Warne said.

"Have a look at the players that have come underneath Michael Clarke's captaincy – Steve Smith, Mitchell Johnson, David Warner – class players, all under his leadership.

"Have a look at what the Australian team has done – won a couple of World Cups, just beaten South Africa in South Africa, beat England 5-0.

"So we lost a couple of Test matches, stop trying to blame everything else and say, 'You know what, we played poorly and England were too good.' It's as simple as that."

Warne also backed chief selector Rod Marsh to remain in the job, but he said there were mistakes made.

"When you lose, the microscope comes over everything. I think selection through this series was poor," he said.

"I don't think Rod Marsh should go, but I think they should learn from it.

"I think Rod Marsh and the selection panel got a lot of things wrong. Shane Watson and Brad Haddin playing one Test match, I don't think was right.

"They either shouldn't have played the first Test match and tried somebody else or they should've given them at least a couple of Test matches to prove their form."