Barcelona president Sandro Rosell has offered to testify before a judge to try and resolve a legal challenge filed by a club member over the signing of Brazil forward Neymar.

Neymar was paraded as the Spanish champions’ marquee signing when they beat off competition from Real Madrid to lure him from Santos in the close season and the club said he had cost €57.1 million.

However, precise details of the contract were not revealed with Barca pointing out the existence of confidentiality agreements.

A club member, Jordi Cases, having not received the information he requested about the deal, then took legal action.

Rosell denies wrongdoing and the club reacted angrily after the state prosecutor asked the judge to open proceedings for possible misappropriation of funds.

Neymar’s signing was “complex” and an example of “business engineering” and they would act forcefully to defend the honour of the club and the president, Barca said.

“Having anticipated you would ask about this, there are two points I would like to make,” Rosell told a news conference.

“The first is a reaffirmation... that Neymar cost €57.1 million, full stop. I am saying it for the umpteenth time and that’s enough now.”

“The second is a request, with all my respect for the judge in this case. I ask him to initiate proceedings and calls me to testify, precisely so I can tell the judge anything he would like to hear because there is nothing to hide,” added Rosell.

Spanish daily El Mundo reported on Monday it had access to court documents that showed Neymar had cost a total of €95 million including various commissions and fees paid to the player’s family.

That would make him the second most expensive player in history after Real paid Tottenham Hotspur €100 million for Wales winger Gareth Bale last year.