I think there's no need to discuss about Barcelona vs Napoli and Arsenal vs FC Porto, it's a sure win for both Barcelona and Arsenal, Napoli and FC Porto aren't that good compared to last season.
Surely win for Barcelona and Arsenal, seriously Despairo?
I agree that Napoli and Porto are worse than themselves in the last season but are Barcelona and Arsenal are the same as they were in the past season or are they better?
Both Barcelona and Arsenal are not better than themselves one season ago and Barcelona are even worse. Porto is very experienced in Champions League and you have to know in the last season, they went to quarter finals before lost to Inter Milan. Arsenal lost to another Portuguese club, Sporting Lisbon in Europa League, even at their home stadium.
What I think we need to pay attention is PSG vs Real Sociedad and Inter vs Atletico Madrid, I believe most people will think PSG and Inter will win since both of them were strong in the last season, but I believe this time Real Sociedad and Atletico Madrid able to prove themselves even though they're underdog.
PSG seems to get a very lucky draw for this round with risk of meeting many big clubs because of their second position in their group. Inter Milan are at same quality level as Atletico Madrid and even they were a runner-up in the past season, this pair is unpredictable for a winner.