ITF perfects its anti-doping policy

David Howman expresses his attitude to anti-doping programs in several sports organizations. While the director general of the WADA seems to be happy with jobs of several sports organizations, he notes that anti-doping policies in other leagues/teams are not suitable.
For example, the director general of the WADA praises the International Tennis Federation (ITF) for its anti-doping policy. The director general of the WADA affirms that anti-doping program is appropriate in tennis.
But as for the National Basketball Association (NBA), it doesn’t desire to adopt its anti-doping policy to that of the WADA. It refuses to add some new drug tests in order to catch those who administer steroids and/or other banned preparations. That’s why the director general of the WADA claims that the anti-doping system of the NBA is not good enough to detect those that dope. He states that the NBA should add more sophisticated new methods as well.
The director general of the WADA notes that drug tests conducted in tennis are of high quality. But there is a defect in tennis’ anti-doping policy. A lot of tests are conducted during competitions. But few tests are conducted out-of-competition. That’s why ITF’s anti-doping policy is also criticized.
Undoubtedly, nobody can confirm that anti-doping program of ITF is perfect. It has certain lacks too. But it is quite adequate.
Thus, you should not believe that tennis is clean from doping totally. Some tennis players are likely to take steroids and/or performance-enhancing drugs. But it is not so tainted, as some other sports.
 Just one tennis player was suspended for administration of prohibited drugs. However it seems to prove that tennis is not tainted, it is necessary to take into account that there are several ways to avoid detection. As you probably know, the prominent cyclist Lance Armstrong took steroids and other performance-enhancing drugs and avoided detection much time. Couldn’t tennis players act the same way?