Are tennis players subjected to urine tests, blood tests, or both?
Both, but not necessarily at each and every test. The ITF has the right to test for urine, blood, or both at any time, in competition and out of competition. It may also take different amounts of urine or blood, depending on which tests are scheduled (the EPO test, for example, requires more urine). According to its records, the ITF did not conduct any out-of-competition blood or EPO tests in 2009. And the only in-competition blood and EPO tests conducted by the ITF were done at Grand Slam tournaments.
