Berta Aguinaga made specific reference to the International Olympic Committee's (IOC) Evaluation Commission's visit to Madrid this week as part of the city's bid for the 2020 Olympic Games.
Assurances were made to the Commission that a proposed new statute which would bring Spanish law into line with the WADA code on doping would be passed by June, three months before IOC members make a final decision on who will host the Games.
And Aguinaga argued that should Magistrate Julia Patricia Santamaria refuse to grant WADA access to the blood bags seized from flats belonging to Fuentes, it would send a conflicting message.
"During these days we have heard the authorities say a lot about Spain's real commitment against doping," she told the court.
"I hope that is materialised in the handing over of the bags."
Aguinaga also repeated calls made earlier in the week by counsel for the International Cycling Union for six Spanish cyclists who gave evidence to be indicted for perjury.
She said that Angel Vicioso, Isidro Nozal, Joseba Beloki, Unai Osa, David Etxebarria and Marcos Serrano had "flagrantly failed to tell the truth by denying the obvious."