Gunners forward Eduardo broke his leg after a challenge from City defender Martin Taylor in February last year, and Ridgewell's tackle on Walcott got alarm bells ringing at the Emirates of a repeat incident.
"I was sliding in from behind, getting the ball. My momentum carried me through," Ridgewell told the Birmingham Mail.
"He's a fellow professional, a young Englishman, and I wouldn't intentionally try to hurt anyone, especially someone you want to go and help win the World Cup for us basically.
"It's a pity such a big thing was made of it. He didn't come out and say anything, I didn't come out and say anything and it was just disappointing that certain people - who had nothing to do with it - said stuff.
"The main thing for me was to just get a tackle in, and it was there, the ball was there to be won. I think maybe that's what it was, a lot was made because of what happened (with Taylor).
"It's a pity it keeps getting brought up. Sadly, I think that's the way football is."
Ridgewell himself suffered a broken leg in April against Plymouth Argyle, but the former Aston Villa stopper scored on his St Andrews return against Sunderland at the weekend.
The 25-year-old denied that he had been feeling his way back after the injury, and revealed that manager Alex McLeish had asked him if he had been protecting himself in a reserve match.
"The gaffer did ask me, he mentioned that, and I just said 'no, not really'," he added. "I felt that there wasn't a tackle that I needed to make in the games I'd played.
"If there is one that is needed to be made, I make it. I always have done. It's a pity that it was questioned really because I never shirk out.
"I was just waiting for the right tackle and that was the other week basically."
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