Dida was one of those keepers who looked like he should have been world class. And for a time, he was certainly in the 'best keeper in the world' argument. But, at the height of his powers he seemed to regress and he seemed to slip away from the top level in what should have been his prime.
You may have assumed he'd retired by now and considering he's 41, that would be a fair shout. But no, he's still plucking away in the Brazilian league with Internacional and he's in incredible shape judging by this video.
Video via /r/soccer