Defenders had the option of timing their tackles immaculately, like Beckenbauer/Bobby Moore, or crude assaults like Gentile without fear of getting sent off.
No way would Messi/Ronaldo be allowed to freely waltz across the pitch with or without the ball without ending up on their arses with the ref playing on. They are, no doubt, great players so would have adapted like Maradona was forced to after this experience but we will never know till we see if Messi/Ronaldo have learnt how to avoid being marked out of games like they both were, this last World Cup!