Pakistan are on the receiving end in the one-day series after blanking England 3-0 in the preceding Test series, with Khan stressing his team needed improvement.
"We have not played well as we did in the Tests. I will not take any credit away from England but we have to look at ourselves and we need to raise our standards in all three departments to avoid defeat," Khan said on Monday.
Pakistan have been outsmarted by England who rode on back-to-back hundreds by skipper Alastair Cook to win the first two matches in Abu Dhabi and then Kevin Pietersen hammered an unbeaten century - his first since 2008 - to win the third match here on Saturday.
Paceman Steven Finn has taken 11 wickets in three matches to destroy Pakistan's batting.
England have whitewashed Pakistan in a 3-0 series once, on their 1987 tour.
Khan pinpointed fielding as the major difference between the two teams.
"We give away 20-30 runs in every match while England save 20-30 with their fielding so it comes to a 40 run difference. Our batsmen have not been able to capitalise on the good starts while England's batsmen did that," said Khan.
Asked was he disappointed at the prospects of being replaced by former Australian batsman Dav Whatmore next month, Khan said: "There is nothing to be disappointed. I will be there to help Pakistan cricket in any capacity."
Appointed on an interim basis after Waqar Younis quit in September last year, Khan guided the team to series wins against Sri Lanka and Bangladesh (Tests and one-day) and England (Tests).
"I don't need any coaching qualification or need to do courses because I helped the team with my experience so I have no disappointments," said Khan, who is likely to take back his post as chairman of the selection committee.
Eoin Morgan admitted England have a good opportunity to blank Pakistan.
"There's certainly an opportunity to do that. We do want to win 4-0 and if the opportunity arises we could give players (reserves) a bit of experience, but the priority is to win the game," said Morgan.
Morgan said England have progressed well in one-day cricket after being thrashed 5-0 in India last year.
"In our last summer we've come a long way. But the stint we did in India - when I wasn't there - pegged us back a long way. So we're starting from scratch in terms of playing in this part of the world.
"We've got off to a fantastic start. But it comes back to a case of not getting carried away with where we are or where we want to be. Where we are is fifth in the world; where we want to be is number one in the world by the World Cup in 2015," said Morgan.
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It is sad but entirely expected that Mohsin should dismiss the need to have formal training and qualification in order to coach at international level. He seems to be living in the past, the past of gentlemen amateurs limited by their personal experiences. If the series against England has shown anything as clear as day light is that the structural weaknesses of the Pakistan side are unresolved despite Mohsin's best efforts. There continues to a be instability at the top of the batting largely due to technical failings, most tellingly the vulnerability to the seaming new ball. The catching and the ground fielding is still not in the league of test playing nations. The bowling could do with more discipline and the comparison with England on this score highlights this. And mentally they remain brittle in adversity. We need a qualified coach with international experience and full authority and resources to deploy a team of his choosing including batting/bowling/fielding assistants and sports psychologists to mould the team from a bunch of talents cricketeers to consistent match winners.
when ever predictions are made Pakistani team proved opposite therefore keep mouth shut and keep sincerity in performance.
Its high time that Zaka Ashraf gets on the field and show the boys how its done. Zaka Ashraf should play the 4th ODI.