The heavyweight fighter was beaten by the New Zealander on a split decision but suggested that his performance in the fight proves that he still has more to offer.
Chisora told Sky Sports: "I was putting in more power punches, inside work, but I can't get upset anymore.
"But you know what, I won't let them slow me down. No way. I will not let them slow me down. I will go again.
"They want to see me retire, but I'm not retiring yet, forget that."
Chisora was bitterly disappointed by the loss and is adamant that Parker should offer him a rematch.
He said: "This is horrible. I train hard every day, I give everything in the gym, and when I put it all in there, these are the results I get.
"But Joe said he wants to give me a rematch. If he wants to give me a rematch, I'll take the rematch easy, but this is unbelievable. I won the fight, even his coach Andy Lee said I won the fight."
Parker praised his opponent for contributing to an entertaining bout and is now aiming for another world title fight.
He said: "The boxing skills won me some rounds towards the end. It was a very close fight. I thought it could go either way, and I'm very thankful and blessed to get the win today.
"He brought the smoke. If you want to feel it, jump in the ring with him.
"It's very achievable [another world title fight]. I just have to get back to training. There's a lot of things I have to work on."