The manager saw his side hit the woodwork twice before finally getting the equaliser from a late penalty after Leon Osman was felled inside the Stoke box in injury time to win the Blues their first penalty all season.
Martinez said, “I never felt that we didn’t have a chance because the character of the team was immense.
“I knew that with the conditions of the weather and the way the game was being played that the first goal was going to be significant. We were very unfortunate to hit the crossbar twice and (when that happens) you feel it is not going to be your day.
“But I couldn’t be happier with the reaction. I thought we were patient enough at times but penetrating enough too.
“Probably we should have got the three points rather than one but it is a positive result. It will seem a significant point at the end of the season.”