It was Mancini's first loss, made more notable for a recurrence of Roque Santa Cruz's calf injury after just four minutes that will keep him out for at least a month and his replacement, Robinho, being substituted himself early in the second half as Shaun Wright-Phillips was introduced.
"It was a bad night for us all. Robinho can play well but it is not always possible and on Saturday he played the same as his team-mates.
"When I put Wright-Phillips on I had to take a striker off because I cannot keep five forwards on the pitch.
"I had to decide between Robinho and Carlos."