The Portuguese forward -- who plays for Juventus in Italy's Serie A league -- has vehemently denied the accusations, and his lawyer Peter Christiansen said the request was standard procedure.
Former model Kathryn Mayorga, 34, of Las Vegas, accused Ronaldo in a complaint filed last year in the state of Nevada.
Meantime Ronaldo doesn't show any sign of frustration and appears happy and smiling on social media.
There was no significant reaction when Ronaldo's name was read out for the team introductions before kickoff.
Juventus travel to Udine in northeastern Italy, on the border with Slovenia, to face Udinese, who are 14th in the table.
The events allegedly dating back to almost 10 years ago do not change this opinion, which is shared by anyone who has come into contact with this great champion, the defending Serie A champions said.
Mayorga alleges she was pressured into signing a nondisclosure agreement in 2010 to keep the alleged rape secret and is seeking at least USD 200,000 in penalties and damages.
Ronaldo, who now plays for Juventus in Italy's Serie A, rejected the charges as fake news during a live chat on Instagram.