The Hammers had equalised in the first half through Carlton Cole, but lost.
“I am not feeling well now as you can imagine,” the Italian said to ESPN.
“We didn’t play in the first 45 minutes. When you play a team like City and you concede so much then it is very difficult to come back.
“I think this will be an important week for us, we will have to work hard. There are many things we need to concentrate on.
“We are much better than we are showing right now.”
