I think he just missed it as he was trying to deal with the tackle and immediate aftermath which is understandable.Ref was probably too close to the incident (after the foul). He could have been a bit stronger, but that said, it does appear to have simmered down okay, so maybe he was correct!
No it was definitely a penalty - he was tripped, albeit not much, but enough to bring him down at high speed. I thought the ref had a great game! Seemed completely unfazed by Simeone and his antics and dealt with it well.
No hattersfan it was pen did you see replays clearly
Nah, there wasn't enough contact to warrant a penalty - Ronaldo went down FAR too easily.
However, that being said, that one poor decision did little to mar what was an otherwise very good game for the referee.