He claims he doesn't know her.
If there is footage with him and her entering the bathroom, he's clearly lying.
The fact that some people went from "he's innocent" to "he couldn't have done much in 47 seconds" show that those same people would go to the moon in their defense of Alves - "yeah, he touched her but she asked for it / she should have been proud that a great footballer like Alves took an interest in her".
He's lucky this discussion takes place on a Barca forum, where a lot of fans would discredit their own mothers if they would allege abuse from one of their favorite players.