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.

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.