Las Vegas officers aim to quiz the ex-Manchester United star about the alleged sexual assault of Kathryn Mayorga, 34, in June 2009.
The case was reopened last week but as the player is abroad they are unsure when his statement will be taken.
Ms Mayorga initially refused to name her alleged attacker and later agreed a settlement with Ronaldo for £287,000 in return for not discussing the case.
In August she approached Vegas police asking for the case to be reopened
Ronaldo strongly denies the claim. SHARE THIS STORY USING ANY OF THE BUTTON BELOW ⬇ PLACE YOUR TEXT ADVERT BELOW ⬇⬇⬇