London - Britain's Andy Murray admitted that drug testing was a necessary if inconvenient factor after being tested four times in the last month.
Murray revealed after his opening round win over Spain's Daniel Gimeno-Traver at Wimbledon that he was even woken up at 7:00 in the morning last Thursday to undergo a test just as he was hoping to enjoy a rare lie-in.
"It's just very intrusive when you get someone in your house in the morning. When you're going to the toilet and they're staring at you, in your own home, it's just quite a strange feeling," said world number four Murray.
"You have to give one hour every day where they can come. I put it at 7:00 because I know I'm going to be in bed.
"It's just a bit annoying because it was my day off and I was looking for a lie-in. I was fast asleep. I looked at my clock and it was bang on 7:00. I knew it was them. He rung the bell six times as well.
"It's pretty normal at this time of year. I get tested here when the tournament's done. I'm sure the French Open always tests. And then, because I'm at home, they always come right before Wimbledon, and then probably at the Davis Cup.
"So it's a lot of testing, but just part of our job, unfortunately. My mum made them a cup of tea, which we shouldn't do."