ATP players defended their sport and the tour&rsquo;s updating of anti-doping information on Wednesday in the wake of drugs cases involving 15th-ranked Croatia&rsquo;s Marin Cilic and Serbian Viktor Troicki. <img alt="John Isner" src="http://images.mid-day.com/2013/aug/John-Isner.jpg" style="width: 500px; height: 483px;" /> John Isner &ldquo;Tennis does a good job of testing from my experience,&rdquo; said 20th-ranked John Isner, the American number one. &ldquo;Tennis as a whole, I do feel, our sport is clean.&rdquo; The topic has drawn attention after Troicki was banned for 18 months after allegedly refusing to submit a blood sample to a tester and Cilic reportedly tested positive at an April event in Munich. Troicki, ranked 53rd, said he was assured he could skip the blood test without punishment.u00a0Uncertainty about how well informed players are regarding banned substances and the testing requirements then became the issue. &ldquo;Our doping system is extremely tough,&rdquo; said American Mardy Fish. &ldquo;We do get updates. We get a lot of information. There are things constantly coming through e-mails about player regulations, regulated substances.&rdquo; Asked if he thought players were not well informed about doping regulations, Fish said, &ldquo;That wouldn&rsquo;t be my experience, no. I like to take that pretty seriously.&rdquo; Isner said the topic has not resonated with players, saying, &ldquo;As far as talk in the locker room, there hasn&rsquo;t been any at all. These situations are unfortunate.&rdquo;u00a0

In the wake of doping cases involving Marin Cilic and Viktor Troicki, peers come out in defence of the tour's system of updating anti-doping information

Tennis players insist their sport is clean

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Tennis players insist their sport is clean

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