The south London membership signed Doucoure in a deal really worth a mentioned £20 million ($24 million) on July 11 after he inspired for Lens within the French pinnacle-flight final season.
But in a announcement from his attorney Alexis Rutman Sunday, stated by means of British media, it turned into alleged that Doucoure and his entourage have been "victims of blackmail and an attempt at extortion from numerous individuals" given that.
"These people declare, with fake evidence, that my consumer might have a double identification and call for the price of a amount of cash in return for their silence," he alleged.
"Several Whatsapp messages to this effect, followed by false files, have for that reason been addressed to my customer and his entourage over the past few days."
Vieira, in Melbourne with the group on their pre-season tour, said he turned into aware about the incident.
"I spoke to him (Doucoure) and I spoke to the lawyer as properly," he stated at a press convention beforehand of their clash with Manchester United on Tuesday.
"Of path, myself and the membership, we are fully assisting the participant.
"This is something that he as a player and us as a soccer membership we can not take delivery of."
The 22-year-old turned into certainly one of Vieira's top switch goals to update England midfielder Conor Gallager, who has again to Chelsea after last season's mortgage spell at Selhurst Park.
There has been speak that Gallager might also return for another loan spell, however Vieira ruled it out.
