Michael Vaughan believes Alastair Cook is 'clearly bitter ' , and must set aside his own World Cup disappointment for the good of his England team at the start of their Ashes year . Cook claimed on Wednesday that England 's decision to replace him as captain with Eoin Morgan , at the 11th hour before the global tournament in Australia and New Zealand , was proved 'probably wrong ' by subsequent events . England made an embarrassing early exit at the hands of Bangladesh , before the knockout stages were under way . Alastair Cook was replaced as Engtland 's one-day captain before this year 's World Cup . Former captain Vaughan interprets Cook 's remarks as a sign that he is still struggling to come to terms with what happened after losing his 50-over role because of his continued poor batting form . Cook will nonetheless lead England in three Tests against the West Indies , on a tour starting early next month , before returning home to face first New Zealand and then Australia this summer . BBC pundit Vaughan said : 'He 's clearly bitter . ' I think that 's a bad mentality to have , when you think he 's going to be back leading the team in a couple of weeks ' time . ' Cook led England to a Champions Trophy final on home soil two years ago , and the top of the world rankings , but their recent one-day international record under him deteriorated . Vaughan added : 'Alastair Cook 's last six captaincy jobs in ( ODI ) series for England , he lost every single one . 'The only series they 've won was away in the West Indies , when he was n't the captain . ' Michael Vaughan claims Cook is 'bitter ' about the decision to replace him as captain . Cook could only watch from afar as England beat only Scotland and Afghanistan in their World Cup campaign under Morgan , but he sensed they were 'shell-shocked ' and in need of 'real leadership ' . Vaughan argues Cook must move on , and start scoring prolifically again - as he has for the vast majority of his record-breaking career . ' I do n't think it 's great that the captain comes out and criticises the leadership of the captain that takes over - but he 's clearly bitter . 'He 's got to clear that out of his head , because it 's so important that by the time he gets to the West Indies England need him scoring runs . 'He has to score runs in the Caribbean ; he has to get runs against New Zealand - so by the time the Ashes arrive in July , no one is talking about Alastair Cook 's position in the Test team . 'He has n't scored a hundred in any format of the game for two years . That has to change in the West Indies . '
Alastair Cook was replaced as England 's one-day captain . Eoin Morgan led the side at World Cup but England were knocked out . Cook believes the decision to replace him was proved 'probably wrong ' Michael Vaughan believes Cook is bitter about the decision .