He can be pretty clutch, but not convinced by Juve. Dunno if they can get past the likes of Liverpool, PSG or City. Think they'll go out in like the semi-finals.
Juventus' form is often extremely hard to pinpoint. Serie A is nothing like the UCL, and this has been one of Juventus' strengths and weaknesses alike. They've been playing a lot of not-too-convincing matches in the championship against smaller teams, but then made extremely strong perfromances against Napoli (the first time around, not yesterday), Inter, Roma, and so on. Points-wise they're only narrowly behind where they were last year at this point. In UCL they got 16 points in a group with Atletico and Bayer - not a hell group but definitely a great performance, especially considering that the only draw they got was a 2-0 win against Atletico they threw away with two individual defensive errors in the last minutes.
Their attackers are in a great form, yesterday's match didn't go well but for Napoli it was an "end of the line" match, not so much for Juventus. At San Paolo Juventus didn't win a whole lot these past years despite winning 8 consecutive titles. Allegri's Juventus also had tons of 1-0s and 2-1s like Sarri this year. Again, it's very hard to put Sarri's Juventus on the map so far. The championship form is slightly under last year's (but a lot better than Allegri's second year for example), they lost the Supercup (they won some of those and lost others), they advanced in a convincing manner in the national cup so far (many wins the past years), their European campaign so far has been stellar. It's also Sarri's first year so it's clear that a lot of things are still WIP.
Looking at the teams right now, I think we have a great, great UCL ahead of us. I didn't see a single unbeatable team, really. Barca, Real, Atletico, Bayern, Borussia, City, PSG, Juventus... they all seem capable of excellent matches only to then disappoint in others. Various "smaller" teams like Lyon, Napoli and Atalanta that seem to have it in them to fight against any team if they tackle the match right. Liverpool is doing a near perfect run at home but they were a bit less convincing in Europe. Tottenham fell apart, Chelsea nothing too exciting. I'm probably biased but I don't really see many teams that are necessarily ahead of Juventus right now. Perhaps only Liverpool as a whole team at the moment, and even they crashed into Napoli pretty hard this season (just like Juventus last night).