Juventus star Cristiano Ronaldo will not face any charges over an alleged rape in Las Vegas a decade ago after US prosecutors said on Monday they did not have enough evidence to proceed.

A district attorney in the state of Nevada said it would not prosecute the Portuguese soccer player because it "cannot be proven beyond a reasonable doubt" that a sexual assault occurred.

Kathryn Mayorga, a former model, alleges that Ronaldo raped her in a Las Vegas hotel in 2009.

The former Manchester United and Real Madrid forward reached a financial settlement with her one year after the incident.