Great Britain's Dan Evans during his Quarter Final match against France's Jeremy Chardy

Britain's Dan Evans tested positive for cocaine in April, the world number 50 announced on Friday. 

The 27-year-old says he took the illegal substance out of competition and for reasons "completely unrelated to tennis".

"This is a very difficult day for me and I wanted to come here in person to tell you guys face to face," Evans said at a London Hotel on Friday where he took no questions but made a statement.

"I was notified a few days ago that I failed a drugs test in April where I tested positive for cocaine. 

"It's really important you know this was taken out of competition and the context was completely unrelated to tennis."