PSG is not playing very well in the Champions League, so I have little faith in them. They will have less chance of winning than Real Sociedad. It is not known who will take the field, but I assume that the composition of the teams will be the same as in the previous games in the series .Real has a better chance of winning; the defense at the bottom is even better than that of PSG. PSG most likely don’t really need the Champions League, so I don’t expect them to win here.
Sociedad are struggling in La Liga and they have worse performances than the last season. It gives PSG good chance to beat Sociedad even they had not too good matches in their group and only were eligible for round of 16 after a last group match.
I fail to see how PSG don't want to win Champions League because they invested a lot of money over many years, just to win a first Champions League. They got one final match some seasons ago and failed against Bayern Munich. They are wanting to have another Champions League final match and definitely will not want to be stopped to early in this season by Real Sociedad.
Paris Saint-Germain's match against Real Sociedad will be more interesting to watch than the other match between Lazio and Bayern Munich.
Bayern Munich vs Lazio is an interesting match because it can be a decisive match for Tuchel future in Bayern Munich. If Bayern Munich get a bad result from a first leg match, I am not quite sure that Tuchel will still be their coach in a second-leg match. Lazio is not a too strong team in Europe while Bayern Munich bought Harry Kane and aimed at winning Champions League.
A bad result against Lazio, after a shock defeat under Leverkusen, will force Tuchel more closely to an exit gate.