Manuel Pellegrini expects to face a far different West Ham to the one humiliated in the FA Cup when his Manchester City side play hosts on Wednesday.
The Hammers were thrashed 5-0 by Nottingham Forest on Sunday but while their line-up was intentionally weakened, the hefty scoreline only increased the malaise around a club second from bottom in the Premier League.
Sam Allardyce's side now face an unnerving trip to the Etihad for the first leg of their Capital One Cup semi-final but Pellegrini has played down his team's chances of inflicting further misery on the Londoners.
"They had an awful result but I don't think they played with their best XI, they played with young players," Pellegrini told reporters ahead of the clash, live on Sky Sports 1.
"I am absolutely sure (Wednesday) will be a very different game to what they played on Sunday.
"We are going to have to have a very good performance to try to win against West Ham.
"It is very important to play the first leg here at home. We will try to win and if we can score more than one goal at home it will be very important also for the second leg."
Offering his support for Allardyce, who has overseen just one league win in 13, Pellegrini added: "I think that in this job as a manager - in any club, in every part of the world - you are always under a lot of pressure.
"When the results are not the results the club wants, maybe sometimes it can be more nervous, but I think he is doing very good work in West Ham so I don't think he will have any problems."
Watch Manchester City v West Ham live on Sky Sports 1 from 7pm on Wednesday.