Carlos Carvalhal says Sheffield Wednesday's missed oppor
Carvalhal admitted he was frustrated but not disappointed in his team after they failed to build on a dominant 20 minute period in the first half.
Wednesday eventually did go in front through substitute Gary Hooper but a rush of blood to the head from keeper Kieran Westwood saw the Owls give away a penalty which Clayton Donaldson converted.
Then in injury time, after Atdhe Nuhiu had hit the crossbar with a header, Lucas Jutkiewicz hit a dramatic winner for City.
Carvalhal said afterwards: "I do not remember one occasion when my goalkeeper Keiren Westwood had to make a real save before Birmingham's two late goals.
"This is why I am frustrated because in the game we created chances and didn't score."
He added: "I am very happy with our form. We are playing fantastic but not scoring. We again had five good chances against Birmingham.
"If we were not playing well I would be concerned. We play to win but we need to improve our finishing."