Mayorga went public with her story in an interview with Der Spiegel in September, saying the Portuguese worldwide raped her in a Las Vegas hotel room after a chance meeting in June 2009.
Lennard claimed that she was told by Ronaldo that, if she were to date anyone else or even leave her house, he would have her "kidnapped and have [her] body cut up and put in a big and thrown into a river".
Ronaldo has not been served with the lawsuit, Christiansen said.
Ronaldo, 33, is one of the most popular players in the world's most popular sport, having played for European giants Manchester United and Real Madrid before moving to Turin-based Juventus this past summer.
Cristiano Ronaldo is being asked by police in the U.S.to provide a DNA sample in an ongoing investigation of a Nevada woman's allegation that he raped her in his Las Vegas hotel penthouse in 2009, the soccer star's lawyer in Las Vegas said Thursday.
Ronaldo then allegedly raped Mayorga, despite her screaming "no", before saying: "Sorry, I'm usually a gentleman".
The Wall Street Journal, citing an unnamed law enforcement official with knowledge of the case, reported on Thursday that authorities in Las Vegas had sent a warrant seeking DNA from the soccer star to the court system in Italy, where Ronaldo plays as a forward for the professional soccer club Juventus.
The complaint adds that "when Cristiano Ronaldo completed the sexual assault of the plaintiff, he allowed her to leave the bedroom stating he was sorry, he was usually a gentleman".
"I firmly deny the accusations being issued against me", Ronaldo wrote on Twitter.
Mayorga, now 34, reported to police that she'd been raped and received a medical examination.
Authorities have reportedly obtained the accuser Kathryn Mayorga's dress from the alleged incident and are now looking to see if Ronaldo's DNA is a match. Her lawsuit seeks to void the settlement and agreement.
Las Vegas police said they found DNA other than Ms Mayorga's on the dress.
Ms Mayorga signed a non-disclosure contract for $375k a year later but has now waived her right to anonymity to bring about the action.
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