World number three Andy Murray has called for stricter rules on drugs testing in tennis to ensure that it remains as clean as possible.
The sporting world was rocked last month when Lance Armstrong admitted that he doped to win all seven of his Tour de France titles, masterminding the most sophisticated and professionalised drugs regime in sport history.
Murray is keen to avoid a similar scandal hitting his sport, and has called for tighter drugs tests to ensure that it remains clean.
"It's easy when you're growing up to think that something like that wouldn't go on in your sport," the British number one told Sky Sports News.
"But we need to make sure that tennis is as clean as possible and that's by changing the way we are doing the testing. Ideally people would be getting tested every other week but it's not cheap.
"I've been on the tour for seven or eight years - I don't know what's gone on in the past and whether it's complacency or whether it's purely a cost thing [as to why more tests are not being performed]. We need to get it sorted now, I think it's the right time to do it. We can't focus on the past, we [have to] look forward and ask, 'what can we do to make tennis the cleanest sport that it can be'."
Meanwhile, Murray has recently pulled out of the Davis Cup tie between Great Britain Russia in April.