Serena Williams calls for fair treatment on doping test

London: Serena Williams demanded fair treatment from US doping chiefs after the former Wimbledon champion was subjected to a series of tests in June.

Williams arrived at Wimbledon this week on the heels of a report that she was unhappy at excessive targeting from US Anti-Doping Agency drug testers.

A Deadspin article revealed Williams' anger about an unannounced test in June where the tester refused to leave her Florida house. The tester visited outside Williams' specified 'whereabouts window' and found her not at home.

No athlete is obliged to comply with a testing visit if it is not made during the 60-minute window for which the athlete identifies their whereabouts in advance each day.

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, admitted she was disappointed the story had gone public.

But the seven-time Wimbledon champion also 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. It's something I've dealt with for a long time. That's okay," she told a press conference on Sunday.

The 36-year-old had been tested five times, compared to one or none from some of her compatriots.