Manchester United star Cristiano Ronaldo has been arrested on suspicion of rape.
The 20-year-old Portuguese international winger is being questioned by Metropolitan Police officers.
Sky News Crime Correspondent Martin Brunt said the offence is alleged to have been committed at the Sanderson Hotel in London on October 2.
Ronaldo is thought to have been staying at the hotel after playing against Fulham.
He is alleged to have met the complainant - who says she was assaulted during the early hours in a penthouse suite at the hotel - in a West End nightclub.
The player voluntarily went to a police station near his home in Cheshire.
Scotland Yard's Operation Sapphire team, which investigates sex crime, had asked him to attend.
A spokesman for United would not comment.
Ronaldo signed for the club in August 2003 from Sporting Lisbon in a £12.24m deal.
He was named the Sir Matt Busby Player Of The Year at the end of his first season.
The Madeira-born player scored in United's 2004 FA Cup final win over Millwall and was a success during Euro 2004.
:: A second man in his 30s, thought to have been with Ronaldo on the night, also attended the police station but was not arrested.
The 20-year-old Portuguese international winger is being questioned by Metropolitan Police officers.
Sky News Crime Correspondent Martin Brunt said the offence is alleged to have been committed at the Sanderson Hotel in London on October 2.
Ronaldo is thought to have been staying at the hotel after playing against Fulham.
He is alleged to have met the complainant - who says she was assaulted during the early hours in a penthouse suite at the hotel - in a West End nightclub.
The player voluntarily went to a police station near his home in Cheshire.
Scotland Yard's Operation Sapphire team, which investigates sex crime, had asked him to attend.
A spokesman for United would not comment.
Ronaldo signed for the club in August 2003 from Sporting Lisbon in a £12.24m deal.
He was named the Sir Matt Busby Player Of The Year at the end of his first season.
The Madeira-born player scored in United's 2004 FA Cup final win over Millwall and was a success during Euro 2004.
:: A second man in his 30s, thought to have been with Ronaldo on the night, also attended the police station but was not arrested.