The Brazilian missed training on Wednesday morning and said goodbye to his Barca teammates as his blockbuster move drew nearer.
While PSG have met Neymar's release clause with their world record bid, it now appears there may be one final hurdle for the French giants to navigate.
Liga de Futbol Profesional (LFP) president Javier Tebas has accused PSG of "financial doping", claiming the club has raised money for the Neymar transfer direct from its Qatari owners rather than through standalone profits.
When asked whether it was embarrassing for La Liga to be stripped of one of its most recognisable assets, Tebas claimed the league would "not accept" the money from PSG.
"The problem is not that LaLiga is a great championship, which is what it is," Tebas told AS.
"The problem is that Neymar is being taken by a financially-doped team that competes with an advantage.
"The problem is the state-backed clubs, they need to be stopped."
As well as the possible FFP breach, Tebas claimed earlier this week that the player's 2013 transfer from Santos to Barcelona is still subject to legal wrangling.
"Even if PSG do not meet [Neymar's] release clause we are going to report them [to Uefa]," Tebas told the Catalan newspaper Sport on Tuesday.
"We have already warned the president of Paris Saint-Germain that we would do so and we see that PSG's policy has continued in the same manner.
"They cannot invent some numbers where their commercial rights exceed those of Real Madrid and Barcelona. Nobody believes that."
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