(CNN) -- U.S. Open tennis champion Andy Murray has condemned the handling of the Operation Puerto doping trial by the Spanish authorities, accusing them of the "biggest cover up in sports history." A criminal trial in Spain concluded Tuesday with sports doctor Eufemiano Fuentes given a one-year jail term for supplying cyclists with blood transfusions to boost their performance. But the judge hearing the case, Julia Patricia Santamaria, ordered that over 200 bags of blood and plasma seized from Fuentes, be destroyed, pending any appeals. Murray, an outspoken critic of doping, used his Twitter blog to express his frustration. "Puerto case is beyond a joke... biggest cover up in sports history?," he tweeted
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Andy Murray condemns outcome of Operation Puerto doping trial
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U.S. Open tennis champion calls it "biggest cover up in sports history" on Twitter
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IOC and WADA also express their disappointment at ruling by Spanish judge
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200 bags of blood and plasma prepared for drugs cheats set to be destroyed
During his trial, @placeholder gave evidence that he had clients from other sports, including tennis, football, boxing and athletics, but did not identify them.
The @placeholder signaled its frustration with the court ruling Wednesday.