French football star Karim Benzema has been charged as part of the investigation over an alleged plot to blackmail a fellow French international.
The AFP news agency claimed on Thursday that Benzema has been officially charged, citing prosecution officials.
The prosecutor in the case claims Benzema could face up to five years in jail if he is found guilty.
The investigation comes ahead of the Euro 2016 football tournament – to be hosted in France next summer – for which Valbuena and Benzema have been training together as part of their national team.
The 27-year-old has admitted speaking to Valbuena about the tape, and has told investigators that he did so "on behalf of a childhood friend", according to the BBC.
It is thought the alleged communication took place at a training camp in early October, but it is not clear whether the supposed mention of the tape is linked to the alleged attempted blackmail of Valbuena.
Benzema is not being held in custody, but he is now forbidden from contacting Valbuena, due to being under judicial supervision, and is unlikely to have any involvement with the French national team while the case is ongoing.
Benzema's lawyer Sylvain Cormier has told press that his client is innocent:
"Karim wishes to put an end to all the polemics that have emerged following this case, in which he has played no part whatsoever," Cormier told AFP.
"When his name first emerged in the press, Karim immediately made it clear that he was standing at the disposal of investigators.
"Karim went to Versailles to answer some questions, but he has absolutely not done anything wrong. He has nothing to hide.
"He is happy and quite satisfied to be able to finally end this painful controversy."