And according to him, the only coach he needs is the vehicle that drives the team to the ground.
Talking to reporters at a book launching programme here, Warne, sporting an eye injury which he received during a Pro40 match, made it obvious that according to him, Buchanan's role was quite unnecessary that Australia could do away with.
''I believe you need a manager rather than a coach. As an international cricketer, you know you're good enough and you don't need a coach getting too technical with you,'' Warne opined.
''And you end up forgetting that what you're supposed to do is bowl the ball,'' he added.
''I'm a big believer that the coach is something you travel in '' he quipped.
On his chemistry with the Buchanan, Warne was equally candid.
''John and I get along okay but I disagree with certain things he does. I think that his methods over-complicate issues and at some stages he has lacked commonsense,'' the maverick spinner said.
Warne has been overtly critical of Buchanan's unorthodox training methods, including the recent bush training camp.
Shifting focus to the Ashes, Warne said Andrew Flintoff might prove the thorn in Australian flesh.
''We always try to nail the opposing captain early but Flintoff is an inspirational figure and it's hard to get under his skin,'' he felt.