Maybe Barcelona will send PSG home tonight?
PSG will return to their home after this match, no matter what its result is.
and will PSG not be able to do anything to change its fate? I think the outlook so far is still gray and everything is still difficult to predict. Barcelona's advantage is as hosts in the second leg and PSG is clearly quite difficult to reverse the situation even though the difference is only 1 aggregate goal.
PSG still shows their weak mentality that is not good for important match like this. Mbappe with his last season for PSG will want to do something to win Champions League and to be marked in PSG history. This match is a big test for him after a first disappointed match last week. PSG don't have too ability to adjust their tactics and attacking power to other players if Mbappe is controlled. They usually become useless team if Mbappe becomes useless in a match.
The most important thing now is to get through to the semifinals and I think even if they can, they have to get rid of Barcelona first but that's not an easy thing. The Blaugrana will win as much as possible and they will not let in a goal at home.
I really doubt that Barcelona will let PSG come to Nou Camp and go home with a win. They are both big clubs, with many star players but Barcelona has better traditional in Europe and Champions League. With more experience than PSG, Barcelona have good advantage to beat PSG at Nou Camp. With weak mentality, if Barcelona scores first, PSG have risk of collapse by themselves.