Re: How good is Zverev?
Well, he's been the most impressive 20 year old since Nadal or Djok, but look at how not impressive he is by comparison (to at least nadal, not sure what Djok was doing at that age.)
He compares extremely well against any member of the so called Gen useless (I don't really like that moniker) when any of them were his age --i.e. Raonic, Dimi, Nish--and already has 2 Masters, Dimi only has one, anyway ... more impressive it would seem already than any of them, despite being about six years younger.
So that makes him the most impressive young tennis player to emerge in ages. But he's not future Rafa, Fed Djok. UNless he has no competition, then he might look like one. LOL
I think ultimately Shap might be better than him, or at least as good.
AZ's performance is very up and down, but consistently underperforms in slams. That will have to change for him to be considered a champion.