Troicki failed to provide a blood sample after feeling unwell at the Monte Carlo Masters but claimed he had been given permission by the doping control doctor to come back the next day . Roger Federer wants more drugs testing in tennis . Reacting to the debate over Viktor Troicki 's punishment . Federer beats Richard Gasquet at ATP World Tour Finals . Comment:
Roger Federer wants more drugs testing in tennis . Reacting to the debate over Viktor Troicki 's punishment . Federer beats Richard Gasquet at ATP World Tour Finals . Comment: