Will it not be interesting if Aston Villa can somehow pull up the same surprising results as arsenal did, if the two English teams scale pass this phase of the competition it would mean that it will be arsenal against Aston Villa in the semifinals of this competition and Aston Villa would have very good chance of qualifying for the finals of the Champions League because according to statistics their coach has a very good record against Arsenal over the couple of seasons they've played. The result from the Premier League can translate to the Champions League and that could give Aston Villa the first ever Champions League. From what I can see PSG is just in the way of this.
I don't think Aston Villa will win today. PSG team will not consider their opponent as weak at all. Even if Aston Villa is not in good form, PSG will try to win. We learned about PSG's capabilities in the match against Liverpool. PSG players have performed well in both matches against Liverpool.
The most important thing is that PSG now has an experienced coach like Luis Enrique. And only for this reason I consider PSG team as favorite. Also Aston Villa is not a very strong squad. Also today's match is PSG's home match. So I don't expect PSG players to make any mistakes in this match. My guess is that the match will end in 1-0 or 2-1.