Newcastle United owner Mike Ashley felt former director of football Joe Kinnear bungled their sale of Yohan Cabaye to PSG.
The Mirror says Kinnear was asked to leave his post on Monday, rather than resigning of his own accord.
And one of the final reasons was the £19million fee he agreed for the French play-maker which owner Ashley believed has sold the Magpies short.
Kinnear's handling of the one big transfer deal of his eight months in charge of football business at St James' Park left the club up to £5m down on what Ashley had hoped to extract for his star player.
