Tennis great Serena Williams lashed out on Twitter, claiming that the “random” drug tests conducted by Tennis’ governing bodies are actually “discrimination.”

Fresh off a second-place finish at Wimbledon, Williams vented on Twitter Tuesday night as she prepared for another drug test.

“And it’s that time of the day to get ‘randomly’ drug tested and only test Serena. Out of all the players it’s been proven I’m the one getting tested the most.

“Discrimination? I think so. At least I’ll be keeping the sport clean #StayPositive.”

Williams added, “But I’m ready to do whatever it takes to have a clean sport so bring it on. I’m excited.”

According to TMZ, “Serena has won 23 Grand Slam championships during her legendary career — and, according to reports, it’s not unusual for USADA (U.S. Anti-Doping Agency) to test top athletes more than others.”

Follow Dylan Gwinn on Twitter @themightygwinn