The former Chelsea manager's CV was described as "too complicated" by former Clarets chief executive Paul Fletcher when he applied for the manager's job in January 2010
Villas-Boas did not even make it to the interview stage despite impressing the Burnley office with his CV and "amazing" PowerPoint presentation.
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In his new book, Magical: A Life in Football, Fletcher stated: "I don't think any milkman would fathom the meaning of a lot of Andre's presentation.
"The language and jargon of football gets worse by the day. Villas-Boas uses a lot of it. Would Burnley players have ever understood what he wanted if he'd told them to 'solidificate' or some of his other terms?
"He sent a very detailed and lengthy application for the job. His CV and PowerPoint presentation was amazing. If you'd showed it to some of our old managers, they'd have said, 'Blazes, what the hell does it all mean?'
"Even by today's standards there was some complicated stuff in it, with some things that I didn't understand.
"With hindsight, we might have appointed him, but at the time it would have been too big a risk."