Can PSG do that with their current condition, yes for Ligue 1 it still shows that PSG is the strongest and has dominated for several years but UCL is competition that is followed by several strong team from various League, PSG with various great players alone cannot win UCL and moreover now with conditions like this it will clearly be more difficult for PSG to achieve that success.
Tomorrow they will face Liverpool in the first leg and for the last 16 if PSG can knock Liverpool out it is already the best achievement because so far Liverpool is the strongest and most consistent team, but if in this first leg PSG cannot win then for the second leg PSG will definitely be lost and they will be eliminated.
The only advantage that I can see from Paris Saint Germain in this match is that they will play as the host. So with that advantage they can use it to be able to win from Liverpool to make them more comfortable in the second leg later. However, the problem is that the opponent they will face this time is not an easy opponent at all. They are the team with the best statistics in the Champions League in the first phase. Although that is not a guarantee, they still have the capital that can increase their confidence.
Both teams are well-balanced with have strong spots into their domestic league which give them good advantage meeting after long time but still it's not easy to predict about possible result of this match because PSG is having good home advantage and their squad is also doing good in last few matches.
Liverpool is also good with things are completely favorable for them to go through into this game their offense is doing much better, but their recent away performance is problem for them but still it's going to be the toughest game for both teams because PSG will try to take good advantage with having fair chance of win. PSG performance against Brest was amazing, and now they are much stronger and with their defense is also good which giving them good support in pressure games.