• World No3 tested once in 10 years in Dubai but more regularly in Europe
• Federer returns at Miami Open but blames injury on preparing bath for twinsRoger Federer has urged the tennis authorities to implement a doping crackdown in the wake of Maria Sharapova failing a drug test.
Federer revealed before his return to action from knee surgery here at the Miami Open that,when residing in Dubai where he owns a property and spends approximately two months a year, he has been tested only once in the past 10 years.
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Source: theguardian.com