So you're saying that it's a modern myth?Not being funny but that's the total opposite of what the OP is asking. You're talking about a match that actually happened but was stricken from the history books. The OP is talking about matches in the history books that never actually happened.
The most famous one, I think, is when Pat Patterson allegedly won a tournament held in Rio de Janeiro, unifying the WWF North American Championship with the South American Championship to create the WWF Intercontinental Championship. The tournament, apparently, never happened. It was fiction!