player should not be suspended for a couple years (Canas’ original two year suspension
was later reduced to 15 months) for taking a medication that was recommended by a tournament doctor (which appears to have been the case with Canas).
However, we are talking about professional athletes who get paid a lot of money to play tennis for a living.
Tennis pros are reminded repeatedly that they are responsible for everything
that they put into their bodies.
Therefore, as professional athletes they must constantly double-check that what they are consuming is allowed according to the rules.
In the business world, a manager who is preparing a critical report for the company CEO is responsible for all of the data contained in the report.
Therefore, he/she needs to verify that any information he/she didn't personally collect has been double-checked by others involved in the preparation of the report.
Similarly, when a pro tennis player is told to take a vitamin or medication, he/she has the responsibility to double-check that the substance doesn't violate the drug policy.