The 30-year-old man arrested in the northern Athens suburb of Maroussi on suspicion of being behind six attempted rapes has been remanded in custody.
The suspect before a magistrate on Monday and allegedly claimed that he had suffered mental disturbances as a result of problems in his love life.
The judge ordered that he undergo psychological tests while in custody.
The 30-year-old denied any part in the murder of a pensioner in the area. Police have so far not found any evidence linking him to the crime.