It's interesting how Ronaldo and Zidane are grouped together as rivals

It's not like they both reached their peak at the same time and competed fiercely against each other.
Until the '98 World Cup, Ronaldo was clearly the undisputed number one in the football world, but unfortunately, he suffered a seizure right before the final. Zidane won, but they weren't originally compared to each other, so it feels a bit off to say they split an era.
Even after Ronaldo's decline, there was a vacuum where a dominant player should have been.