Rafael Nadal wants stricter medical controls in tennis . His two-year ban was cut in half because the ITF said Odesnik cooperated with its anti-doping program . Sport has been hit by several health problems in recent months . FIFA has introduced a biological passport system to battle the problem . Czech tennis player banned for six months after positive test for sibutramine .
Rafael Nadal wants stricter medical controls in tennis . Sport has been hit by several health problems in recent months . FIFA has introduced a biological passport system to battle the problem . Czech tennis player banned for six months after positive test for sibutramine .