British number one Andy Murray has labelled the Spanish court's decision to destroy all evidence in the Operacion Puerto court case as a "joke".
The judgement to destory more than 200 blood bags came after Eufemiano Fuentes, a doctor that specialised in sports medicine, was handed a one-year suspended jail term for proving blood-doping service to cyclists.
Murray described the decision as "the biggest cover up in sport's history" as some 211 blood bags from 35 difference people were ordered to be destroyed, despite calls from anti-doping authorities around the world who called for the blood to be analysed.
The evidence had been seized as part of Operacion Puerto who raided the Spanish doctor's laboratory back in 2006. The bags were said to contain blood from various athletes from a number of different sports.
Murray, who has called for stricter measures for drug testing in tennis, took to Twitter to blast the decision, saying: "Operacion Puerto case is beyond a joke... biggest cover up in sports history? Why would court order blood bags to be destroyed? #coverup."
There was also dismay from Andy Parkinson, chief executive of the UK Anti-Doping, who struggled to understand the decision.
"We are disappointed in the decision by the Spanish authorities. Dr Fuentes has admitted to having been involved in multiple prohibited doping activities, and linked with multiple unnamed athletes," Parkinson told Sky Sports.
"It therefore cannot be right that these names will remain unknown and that no immediate action can be taken by the anti-doping community to protect our clean athletes."
The World Anti-Doping Agency also struggled to come to terms with the evidence being destroyed as they expressed their disappointment.
"The decision to order the destruction of all the blood bags is particularly disappointing and unsatisfactory for WADA, and the whole anti-doping community," read a statement on the WADA website.
"WADA is currently fully reviewing the decision and any possible appeal or other action with its Spanish legal advisors, and the Spanish National Anti-Doping Organisation (AEA). The deadline to appeal the case is 17 May."