Sparky said: “We should have been professional enough to see it through to the end. We’re very disappointed not to have won the game.”
Robinho did not take part in the match for City.
Hughes added: “The match was in our control but we allowed them back into it.
“A lot of my players know they have not performed well enough. We know there is a lot of focus on us right now and any disappointment will be highlighted but we must be big enough to take that.”