This transfer window, football descended into financial chaos when Brazilian superstar Neymar completed a £197m transfer from Barcelona to Paris Saint-Germain.
The Ligue 1 outfit met his release clause and shattered the world record fee in the process, with the 25-year-old proceeding to score on his debut against Guingamp.
Now, those involved in the game are trying to work out just how the Parisians coughed up the cash for the former Santos man and still abided by the Financial Fair Play rulings.
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Many are sceptical that they have, with Unai Emery's side trying to instigate a fire sale at the moment to offload their deadwood.
However, they have been linked with a £160m move for Monaco starlet, Kylian Mbappe, which surely suggests that there may be some missing legality in their summer business.
Well, they may face some stern consequences because the likes of Barcelona and Manchester United could deliver a hammer blow in the summer of 2018 when PSG's financial records are assessed.
If they do not conform to the rulings, they will face sanctions and, unlike previous times when a settlement has been agreed, the likes of Barca and United can appeal the sanction, as reported by The Sun.
Should they do so, the French giants will face a hearing with UEFA's Financial Control Body and could face a much more severe punishment than simply a fine.
In fact, they could be kicked out of the Champions League and handed a transfer ban, two things which would be catastrophic to the club's Qatari owners.
The likes of United, Real Madrid and Bayern Munich would be liable to take action due to the fact that they abide strictly to the financial rules.
As for Barca, well, they would simply be out for revenge despite the dodgy way with which they paid for Neymar.
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