PARIS (AFP) - Two French international footballers Franck Ribery and Karim Benzema went on trial Tuesday in Paris charged with paying for sex with an underage prostitute.

Bayern Munich winger Ribery and Real Madrid forward Benzema face up to three years in prison and a maximum 45,000 euro (S$75,186) fine if convicted.

Both deny the charge and the young woman involved, Zahia Dehar, has testified that the players were not aware that she was not 18 when they had sex with her in 2008 and 2009 respectively.

Although the age of consent is 15 in France, paying for sex with anyone under 18 is a crime.

Dehar, now 21, became a celebrity of sorts following the scandal, having launched her own luxury lingerie line, and has been seen as the muse of German fashion designer Karl Lagerfeld.

The 30-year-old Ribery did not turn up at the court as there was "no victim", his lawyer said, seeking for the proceedings to be held behind closed doors due to their salacious nature.

Ribery has admitted having sex with Dehar but has maintained he did not know she was then under-age. Benzema meanwhile denies any encounter.

News of the investigation into Ribery and Benzema broke just before the disastrous 2010 World Cup campaign, during which unprecedented bickering within the French squad resulted in a player boycott.

The trial continues till June 26.