The goalkeeper told City's website: "We showed as a team at Pompey that what happened at Chelsea was a one off and a fluke. That is three clean-sheets in succession now and we have shown we have the spirit to bounce back.
With many expecting Hart to have had his chance after that ill-fated trip to the capital, he has certainly belied his age in the face of such tough opposition of late.
The 20-year-old added: "I don't think that I could be blamed for what happened at Chelsea but I suppose it would have been easy for the boss to drop me. That he didn't just added to my confidence.
"I don't listen to rumours. I just get on with what I have to do and try to do it the best that I can. I have possession of the shirt and it is up to me to keep it for as long as I can.
"It was a dream to play in a game like that and our critics seem to be melting away by the week. There is a big chunk of the season gone now and we are not where we are by luck or through accident.
"We have not just had a good start - it has been a tremendous one. Now we just want to keep on rolling."