Manchester City boss Manuel Pellegrini won't underestimate Capital One Cup semifinal opponents West Ham United.

A weakened Hammers side were thrashed 5-0 by Sky Bet Championship side Nottingham Forest on Sunday.

Pellegrini said: "They had an awful result but I don't think they played with their best XI. They played with young players.

"I am absolutely sure tomorrow will be a very different game to what they played on Sunday.

"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."