The spokesman for 25-year-old Robinho, Britain's most expensive player, said he had been interviewed by police on Tuesday but "strenuously denied" the allegations.

"We can confirm that Robinho met the police today, as pre-arranged and as part of a criminal investigation," spokesman Chris Nathaniel said in a statement on Robinho's official website.

"He strenuously denies any allegation of wrongdoing or criminality and is happy to cooperate with the police if further required."

West Yorkshire police in northern England confirmed a man was arrested on Tuesday and was questioned in connection with a serious sexual assault in a Leeds nightclub on January 14.

A spokesman said the man had been released on bail pending further inquiries.

Manchester City declined to comment on the arrest. The Sun newspaper reported a teenaged student had alleged she was raped by Robinho at The Space nightclub in Leeds.

The report said Robinho, who is married and has a son, had gone to the nightclub for a night out with his teammates. Earlier this month Robinho walked out of the team's warm weather training camp in Tenerife and headed for Brazil, citing an "important family matter", thought to be his birthday.

He returned to Manchester on Sunday and held a meeting with the club's manager Mark Hughes the following day, who said Robinho would be fined for leaving the training camp without permission.

Robinho, whose full name is Robson de Souza, joined Manchester City from Spanish giants Real Madrid in September for 32.5 million pounds (34.8 million euros, 46.2 million dollars).

He arrived at the club following its takeover by Sheikh Mansour bin Zayed al-Nahyan of Abu Dhabi. Chelsea had been the frontrunners to sign Robinho before City's billionaire owners topped the London club's bid on the transfer deadline day last summer.