De Zerbi is said to have received a job offer by Tottenham. But he has decided to stay at Marseille instead.
Technically they are also going to the Champions League now so...

He must have not wanted to start over while everything is going decent at his current team already.
Previously, PSG was rumored to be interested in the young talent of the Argentine National Team, Franco Mastantuono. But it seems that PSG's interest is hampered by competition from Madrid.
I am sure PSG also has several names of players that they will bring in. The competition in Ligue 1 may not be too tight for PSG. But for the Champions League, with all teams definitely improving their teams, PSG cannot just be satisfied with the current team.
Yeah and actually it seems to be a done deal for Real Madrid. It must be for around 40 million euros or so. He is only 17 but has a magical left foot.

PSG must be disappointed with failing in his signing.