Tennis must guard against doping even if performance enhancing drugs have not been a major problem in the sport, according to former world number four Tim Henman.
"People have cheated, we've had positive drugs tests in tennis and we've got to be absolutely at the forefront of testing to make sure that the deterrent is great enough to put people off," the Briton told The Tennis Space website.
High-profile men's players Marin Cilic of Croatia and Serbia's Viktor Troicki both fell foul of anti-doping regulations last year.
Cilic served a four-month ban for taking a banned stimulant while TroickiRead More »from Doping? Not very significant in tennis, says Tim Henman