Chelsea would have to pull off a miracle to beat Barcelona. Not only are Barcelona better on-paper anyway, but this season they have *really* performed. They are absolutely dominating in Europe and both the club and Messi have had their best start to a season ever.
Unless Real finally pick up, PSG should win this match too.
Juve will easily beat Spurs. Spurs are the most overrated club this season - their group was no-way-near as bad as everyone made out. The only real threat was Real, who have been absolutely horrendous this season (even losing to Levante at home), with Cristiano only bagging 4 league goals so far this season (2 of which were penalties). Juentus haven't been great - they got demolished by Barcelona in the group stage (then again, Messi this season is absolutely incredible) and in the league Napoli and Inter have been doing pretty good - but, compared to Spurs, it should be a solid win.
Sevilla should be beating United, but have underperformed both domestically and in Europe this season and so likely won't.
Porto and Liverpool is difficult to call.
Asides from that, the others are pretty straight forward.