“I guess they decided it was a missed test, which really doesn’t make sense. Anyone would logically think that I would have to be home 24 hours a day, or I get a missed test,” Williams told a press conference on Sunday.
“You only get three missed tests. For me it’s a little frustrating. How can I have a missed test when it’s nowhere near the time I should be there?
“It’s really disappointing, shocking. I was just like: ‘That’s just weird’.”
The incident was made public after WTA chief Steve Simon was overheard leaving a message on Williams’ answerphone at an airport.
Williams, preparing for the start of Wimbledon on Monday, made it clear she didn’t expect to have been tested so often this year.
“It’s unfortunate but I guess when you’re in my position, you mention my name, people overhear things and they want to tell the press,” she said.