The Swiss World No 2 said at the Rotterdam World Tennis that the object should be to make sure that players were dissuaded from the temptation to cheat by the certainty that they would be caught.
“We should do more in terms of blood testing,” said the 31-year-old. “I also support the biological blood passport, with information stored away. It’s important to make sure that tennis is credible and clean to a maximum.
We don’t want players even getting the idea to cheat. Of course we need more funding. Maybe the Grand Slams should put in more since they have the most to lose if one of their players is not clean,” he added.
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