And now, the financial restrictions are off again. Tradition dictates that PSG will find the most expensive superstar on the market, with the biggest ego, entourage and social media following, and bring him to Paris immediately.
The issue is, they have already lost one, and could see another depart. Mbappe has notified the club that he will not be renewing his contract, and has always had one eye on Madrid. If the right bid comes in, Mbappe will be playing in white next year.
And there aren't really any other big stars available. Vinicius Jr just signed a massive contract to stay in Madrid, and took Cristiano Ronaldo's old number. Erling Haaland will not leave Manchester City. Salah is in his 30s, and Liverpool would never sell him.
So, PSG, finally, are forced to look elsewhere. Ugarte was the start, but the recruitment team, led by value-for-money guru Luis Campos, has already made some moves. Marco Asensio has been brought in on a free after failing to agree a new deal with Madrid. He is not the player that he used to be - a torn ACL stunted his career growth. But he is still a top-quality right-winger, a player good enough to play for PSG who is, positionally, an adequate fill-in for Messi.
Mallorca's Lee Kang-in is also soon to be a PSG player, according to Foot Mercato. An attacking midfielder, the South Korean was a crucial player for one of La Liga's biggest surprises last year, leading the plucky club to a top-half finish with 13 goal contributions. Where, exactly, he fits in remains to be seen. But he will certainly be a sound addition for less than €20m.
Suddenly, PSG have strengthened their starting XI for relatively cheap, without adding any massive egos to the dressing room. Next up is supposedly Bernardo Silva. The Parisians agreed on a deal for the Portuguese last summer, but were unable to make the transfer happen. Campos has a pre-existing relationship with Silva, who has nothing left to win at City.
Campos is also after a centre-back, and will benefit from a market flush with options. Although the arrival of Milan Skriniar should be of some benefit, the former-Inter man is similar in profile to Marquinhos, and the Parisians ideally need a left-footed option. Josko Gvardiol would be a top-tier target, but Campos, the savvy recruiter that he is, will likely have a more affordable player or two in mind.
There are, admittedly, some complicating factors here. Mbappe's presumptive exit leaves the Parisians with a hole up front. Ironically, the player Mbappe openly coveted as a teammate might be an option. Randal Kolo Muani is ready to move on from Frankfurt. He will cost an unfriendly €100m (£89m/$107m), but for one of the best strikers in Europe, that number is simply the going rate. If he's the most expensive signing and arrives with a host of others at agreeable prices, PSG will have done well.