Attorneys for a Nevada woman accusing Cristiano Ronaldo of rape say the soccer star's legal team should turn over evidence about the origin of documents cited in European media reports about the case.
Christiansen also argues that the $350,000 settlement agreement should not be considered an admission of guilt.
"By 2015, dozens of entities (including law firms) in different parts of Europe were attacked and saw a lot of information on their electronic equipment being stolen by a hacker", the attorney said.
The lawyer did not make clear exactly which "portions".
Police have reopened an investigation.
Anything that proves that documents were altered, fabricated or inaccurate also "should be immediately turned over to the appropriate law enforcement agencies", attorneys Leslie Stovall and Larissa Drohobyczer said in a statement emailed to media in the US and overseas.
A statement from lawyers, Larissa Drohobyczer and Leslie Stovall, representing Mayorga, said: "We thank Cristiano Ronaldo's latest lawyer for confirming and admitting in his October 10, 2018 statement that the "Football Leaks" documents were obtained from Cristiano Ronaldo or individuals acting on his behalf".
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When DER SPIEGEL published its first story about the alleged rape and about the out-of-court settlement between Mayorga and Ronaldo in 2017, his advisors called the report "journalistic fiction".
Christiansen on Wednesday also said documents reported to contain statements from the player had been altered.
Mayorga, 34, a former model, filed a lawsuit on September 27 in Nevada acknowledging that she accepted $375,000 to keep quiet about the encounter with Ronaldo in a hotel penthouse.
'While Mr Ronaldo does not deny the existence of the mutual agreement and release, his motivations for agreeing to that resolution have been twisted to say the least'.
'We have no reason to believe that those documents are not authentic, ' Der Spiegel spokesman Michael Grabowski said.
He said on Twitter: "I firmly deny the accusations being issued against me". He is "confident that the truth will survive this frenzy", his lawyer writes, and he trusts that "the laws of Nevada will be upheld and enforced".
Ronaldo joined Madrid from Manchester United in a world-record transfer during summer 2009, with the Old Trafford outfit accepting Real's £80 million bid on June 11, and his presentation at the Bernabeu as a new Los Blancos player taking place on July 6.